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{{Squadron
{{Squadron
| name = Sirius Squadron
| name = Sirius Squadron
| seal =  
| seal = [[File:Siriuspatch1.png]]
| unit = Fourth Fleet Operations
| unit = Fourth Fleet Operations
| taskforce =  
| taskforce =  
| taskgroup =  
| taskgroup =  
| headquarters =
| headquarters = Gateway Station
| flagship = [[USS Sirius|USS ''Sirius'']]
| flagship = [[USS Sirius|USS ''Sirius'']]
| co = [[bfms_char:12418|Commodore Matt Rourke]]
| co = [[bfms_char:12418|Commodore Matt Rourke]]
| xo = [[Bfms char:89925|Captain Addison Faust]]
| xo = [[Bfms char:89925|Fleet Captain Addison Faust]]
| quadrant = Beta Quadrant
| quadrant = Beta Quadrant
| mission = Diplomacy, Humanitarian Aid, and Exploration
| mission = Expeditionary Operations
}}'''Sirius Squadron''' is a formation based out of [[Gateway Station]], on the Federation's [[Beta Quadrant]] border. Its primary duty is to support Gateway's mission in the [[Midgard Sector]] to maintain regional stability through diplomatic and humanitarian operations and pursue avenues of scientific research and exploration into the former territories of the [[Old Romulan Star Empire]]. With starships capable of a range of operations, the squadron is a versatile formation able to conduct a variety of long-term missions and respond to diverse emerging situations. Since the escalation of tensions with the [[Klingon Empire]] and their interest in the territory of the fallen Star Empire, Sirius Squadron has been a cornerstone of protecting both the Federation border, and Starfleet's allies in the [[Romulan Republic]].
}}'''Sirius Expeditionary Squadron''', also known as '''Sirius Squadron''', is a squadron of the [[Fourth Fleet]] centered around the [[Odyssey Class|Odyssey-class]] [[USS Sirius|USS ''Sirius'']] that serves as a rapid deployment force. While the unit is under the oversight of [[Bfms char:131092|Vice Admiral Owen Morgan]], Director of Squadron Operations, Commodore Matt Rourke serves as the squadron's field commander from the flagship ''Sirius.''


Its commanding officer [[bfms_char:12418|Commodore Matt Rourke]] leads from the flagship [[USS Sirius|USS ''Sirius'']]''.'' The squadron is assigned directly to [[Fourth Fleet]] Operations and not one of the fleet's task forces, though is often favoured by Director of Fourth Fleet Intelligence [[bfms_char:16756|Admiral Alexander Beckett]] for special assignments.
It stands ready to deploy outside or on the fringes of Federation territory at short notice to respond to emerging situations across the galaxy. With multiple versatile and powerful ships at its disposal, the squadron can operate independently and without support for extended periods, and is flexible enough to face a range of missions, including under volatile circumstances where objectives and conditions can quickly change. While this profile often leads Sirius Squadron to respond to geopolitical crises, the unit’s versatility make it equally suited emergent scientific investigations.


Since its formation in 2400, the squadron has been at the forefront of some of the Fourth Fleet's most urgent situations of the 25th century, including the Lost Fleet crisis of 2401.
The squadron is based out of [[Gateway Station]], in the [[Midgard Sector]], which provides logistical support and operational and administrative leadership.


==Leadership==
The HQ unit is organised around the Sirius herself, supported by her attached ship Alhabor. Four additional divisions provide specialist support:
* '''Endeavour Division:''' An administrative grouping including allied [[Romulan Republic]] and [[Klingon Empire]] assets assigned to the Fourth Fleet. The division exists primarily to maintain unified oversight and communication, each ship answering directly to squadron command, rather than to deploy as a task group.
*'''Liberty Science and Exploration Division:''' Conducts exploratory operations primarily beyond the Federation's borders, expanding Starfleet's understanding of unknown regions. When deployed alongside the squadron, these ships provide support through reconnaissance and advance operations.
*'''Memphis Division:''' Advances the squadron’s knowledge through sustained research, survey missions, and integrated intelligence work. Specialises in follow-up study and the detailed analysis of squadron-priority regions, organisations, or phenomena.
*'''Tannhäuser Operations and Outreach Division:''' Provides engineering, humanitarian, or diplomatic services primarily on the Federation frontier. This division is the most likely to be deployed as a unit and can be sent to whole regions in need, giving disaster relief or building infrastructure. When deployed alongside the squadron, these ships provide logistical support.


*January 2400 - January 2401: Captain Matt Rourke
In times of need, the squadron may form ad hoc units drawing from any ship to facilitate a specific mission profile.
*January 2401 - March 2401: Fleet Captain Lionel Jericho
*March 2401 - Present: Commodore Matt Rourke


==Composition==
Since its formation in 2400, the squadron has been at the forefront of some of the Fourth Fleet's most urgent situations of the 25th century, including the Lost Fleet crisis of 2401. It is assigned directly to [[Fourth Fleet Operations]] and not one of the fleet's task forces, though is often favoured by Director of Fourth Fleet Intelligence [[bfms_char:16756|Admiral Alexander Beckett]] for special assignments.


=== USS ''Sirius'' ===
==Staff and Leadership==
[[File:Siriuswiki1a.jpg|thumb]]
In addition to starship commanders, Sirius Squadron has an established staff of key officers in leadership positions and providing essential squadron support.  
'''Flagship''' - [[USS Sirius|USS ''Sirius'']] is an [[Odyssey Class|''Odyssey''-class heavy explorer]] and the flagship of the squadron, under the command of Commodore Matt Rourke. With her size and self-sufficiency, Sirius is the main hub of all squadron operations, able to support and supply other starships and their crews for an extended duration. When operating in the Midgard Sector, Sirius serves as a forward command post for missions across the region, or is directly responsible for humanitarian, scientific, or strategic duties requiring her vast resources. Whether at the heart of a deployment of the whole squadron or taking primary responsibility for a specific operation, the assigning of the USS ''Sirius'' to a mission demonstrates squadron command takes a matter deeply seriously. Its embarked ''Aquarius''-class escort, the USS ''Alhabor'', provides support for the ''Sirius'' and falls under the nominal command of the ship's XO, [[Bfms char:68948|Commander Zihan Shepherd]].


===Gateway Station ===
*'''Director of Squadron Operations:''' Vice Admiral Owen Morgan
[[File:Gatewaywiki2.png|right|frameless|alt=Gateway Station|300x300px]] '''Squadron Headquarters''' - [[Gateway Station]] is a [[Spacedock Class|''Spacedock''-class space station]], the centre for Federation operations in the Midgard Sector, and the headquarters of the squadron.  Standing at the border to what was once the Romulan Neutral Zone and Star Empire and is now a wilderness of independent factions, Gateway is charged with maintaining regional stability and providing diplomatic outreach. Its strategic significance has only increased with the recent increased aggression from the Klingon Empire, and Gateway is key to protecting Federation interests and allies in the sector.
*'''Squadron Commander:''' Commodore Matt Rourke
===USS ''Endeavour''===
**'''Tannhäuser Division Commander and Squadron Deputy Commander''': Fleet Captain Addison Faust
[[File:Endeavourwiki2.png|right|frameless|alt=USS Endeavour|300x300px]] '''Expeditionary Unit''' - [[USS Endeavour|USS ''Endeavour'']] is a [[Constitution III Class|''Constitution III''-class explorer]] commanded by [[Bfms char:19711|Captain Karana Valance]]. ''Endeavour'' acts as the squadron’s expeditionary unit, the first choice to respond to emerging situations within and without the Midgard Sector. These duties may include humanitarian or tactical crises, but also extend to scientific mysteries or entering diplomatic hot-spots, all tasks within the mission profile of such a versatile ship. She is also capable of acting independently for extended periods, should immediate support be unavailable. Outside of such operations, ''Endeavour'' provides diplomatic and exploratory support for Midgard Sector operations.
**'''Liberty Division Commander:''' Captain Elara Galcyon
**'''Memphis Division Commander:''' Captain Khalid El Sayed
**'''Chief Strategic Operations Officer''': Commander Harrian Cal
**'''Commander, Starfleet Corps of Engineers Unit''': Commander Isabela Cortez
**'''Chief Intelligence Officer:''' Captain Takahashi Haruto
*'''Diplomatic Corps Mission Leader''': Ambassador Sophia Hale


=== USS ''Liberty'' ===
===Command History===  
[[File:Libertywiki1a.jpg|thumb]]
*January 2400 - January 2401: Captain Matt Rourke
'''Deep Space Exploration''' - [[USS Liberty|USS ''Liberty'']] is a [[Sagan Class|''Sagan''-class light explorer]] commanded by [[Bfms char:89825|Captain Taviel Daragon]]. She is responsible for most deep-space exploratory operations into the Midgard Sector and beyond, capable of entering former Romulan Star Empire territory and facing a variety of challenges as Starfleet seeks to chart, survey, and evaluate these vast regions hitherto inaccessible to the Federation. She does not necessarily venture very far from the border, as there is considerable exploration to be conducted close to home, but often acts independently from the rest of the squadron.
* January 2401 - March 2401: Fleet Captain Lionel Jericho
*March 2401 - Present: Commodore Matt Rourke


===USS ''Ranger''===
==Composition==
[[File:Rangerwiki1.png|right|frameless|alt=USS Ranger|300x300px]] '''Research and Survey Vessel''' - [[USS Ranger|USS ''Ranger'']] is an [[Intrepid Class|''Intrepid''-class light explorer]] under the command of [[bfms_char:83152|Commander Thabo Xhakaza]]. With ''Liberty'' taking point on remote or high-profile exploratory operations, the ''Ranger'' acts on survey missions closer to home or conducts more in-depth research following up the flagship's findings. With Starfleet denied access to the Romulan side of the border for centuries, it has limited knowledge of space even immediately across the border, and the ''Ranger'' and her young crew are charged with in-depth exploration of the local area.
{| class="wikitable" style="width:100%"
 
|+
===USS ''Redemption''===
!
[[File:Redemptionwiki4.png|right|frameless|alt=USS Redemption|300x300px]] '''Tactical Operations''' - [[USS Redemption|USS ''Redemption'']] is a [[Sovereign Class|''Sovereign''-class exploratory cruiser]] under the command of deputy squadron commander [[Bfms char:89925|Captain Addison Faust]]. After extensive refits to modernise her systems, the ''Redemption'' is a powerful and well-armed ship, and is responsible for the unit’s tactical and strategic operations.  When not responding to emerging threats, ''Redemption'' remains close to the Midgard border to uphold Starfleet’s commitments and interests in Federation and Republic space.
===Sirius Squadron===
 
!
===USS ''Swiftsure''===
!
[[File:Swiftsurewiki1.png|right|frameless|alt=USS Swiftsure|300x300px]] '''Logistical Support''' - [[USS Swiftsure|USS ''Swiftsure'']] is a [[Echelon Class|''Echelon''-class light cruiser]] under the command of [[Bfms char:60449|Captain Archer Kowalski]]. Her primary duty is the support of other squadron ships and missions, providing extensive logistical and engineering capabilities with her industrial replicators and large complement of smallcraft. She often complements either Gateway Station’s day-to-day support for the Midgard Sector or assists the ''Sirius'' in its front-line operations. Where necessary, she also provides emergency response for humanitarian or medical disasters.
|-
 
|'''[[USS Sirius|USS ''Sirius'']]'''<br />[[Odyssey Class|''Odyssey''-class]]
===USS ''Tempest''===
|Squadron Flagship
[[File:Shackleton1.jpg|right|frameless|alt=USS Tempest|300x300px]] '''Scout''' - [[USS Tempest|USS ''Tempest'']] is a [[Rhode Island Class|''Rhode Island''-class scout]]. Fast and versatile, the Tempest works alongside other squadron ships and missions, fulfilling scouting and reconnaissance duties for both tactical and scientific operations. She is often assigned directly in support of the Sirius, acting as escort, courier, or patrol ship as necessary.
|[[Bfms char:12418|Commodore Matt Rourke]]<br />''Squadron Commander''
|-
|'''USS ''Alhabor'''''<br />[[Aquarius Class|''Aquarius''-class]]
|Flagship Embarked Escort & Special Operations
|[[Bfms char:134569|Commander Hal Cassidy]]
|-
!
===Endeavour Division ===
|
|
|-
|'''[[USS Endeavour|USS ''Endeavour'']]'''<br />[[Constitution III Class|''Constitution III''-class]]
|Exploration and Rapid Response
|[[Bfms char:19711|Captain Karana Valance]]
|-
|'''[[RRW Decimus|RRW ''Decimus'']]'''<br />[[Dhelan Class|''Dhelan''-class]]
|Romulan Republic Allied Vessel
|[[Bfms char:172477|Commander Aetius Lotharn]]
|-
|'''[[IKS Kortar|IKS ''Kortar'']]'''<br />[[B'rel class|''B'rel''-class]]
|Klingon Empire Allied Vessel
|[[Bfms char:171441|HoD Korvath, son of K'marn]]
|-
!
===Liberty Division===
|
|
|-
|'''[[USS Liberty|USS ''Liberty'']]'''<br />[[Sagan Class|''Sagan''-class]]
|Deep Space Exploration
|[[Bfms char:134567|Captain Elara Galcyon]]
|-
|'''[[USS Mercury|USS ''Mercury'']]'''<br />[[Obena Class|''Obena''-class]]
|First Contact and Diplomatic Outreach
|[[Bfms char:89825|Captain Taviel Daragon]]
|-
|'''[[USS Tempest|USS ''Tempest'']]'''<br />[[Rhode Island Class|''Rhode Island''-class]]
|Archaeological and Cultural Studies
|[[bfms_char:162474/|Captain Kate Pentecost]]
|-
!
===Memphis Division===
|
|
|-
|'''[[USS Memphis]]'''<br />[[Sutherland Class|''Sutherland''-class]]
|Research and Development
|[[Bfms char:143546|Captain Khalid El Sayed]]
|-
!'''[[USS Bohr|USS ''Bohr'']]'''<br />''[[Nova Class|Nova-class]]''
|Planetary Surveying and Stellar Charting
|[[bfms char:134404|Captain Juliette Yves]]
|-
|'''[[USS Ranger|USS ''Ranger'']]'''<br />[[Intrepid Class|''Intrepid''-class]]
|Reconnaissance
|[[Bfms char:120993|Captain Gus Tycho]]
|-
!
===Tannhäuser Division===
|
|
|-
|'''[[USS Tannhäuser|USS ''Tannhäuser'']]'''<br />[[Typhoon Class|''Typhoon''-class]]
|Command Operations and Diplomacy
|[[Bfms char:89925|Fleet Captain Addison Faust]]<br />''Deputy Squadron Commander''
|-
|'''[[USS Scylla|USS ''Scylla'']]'''<br />[[Manticore Class|''Manticore''-class]]
|Escort and Strategic Operations
|[[Bfms char:131573|Captain Teodor Borodin]]
|-
|'''[[USS Swiftsure|USS ''Swiftsure'']]'''<br />[[Echelon Class|''Echelon''-class]]
|Engineering and Infrastructure
|[[Bfms char:83152|Commander Thabo Xhakaza]]
|}


==History==
==History==
 
*'''December 2399:''' Diplomatic Corps official [[bfms_char:40627|Sophia Hale]] begins a mission to improve Federation relations with factions of the former [[Romulan Neutral Zone]] through local diplomacy, humanitarian aid, and cooperation with major Romulan governments. The [[USS Endeavour (NCC-87507)|USS ''Endeavour'']], ''Manticore''-class, is the chosen Starfleet platform for this mission before her sudden decommissioning.
===USS Endeavour (2400)===
*'''2400:''' After the commissioning of the USS ''Endeavour'' NCC-91895, joint operations between Starfleet and the Diplomatic Corps resume.
In late 2399, Diplomatic Corps official [[bfms_char:40627|Sophia Hale]] began a mission to improve Federation relationships with the factions of the former [[Romulan Neutral Zone]] through local diplomacy, humanitarian aid, and cooperation with the interested major Romulan governments. The USS ''Endeavour'' was chosen as the Starfleet platform for this mission, First Secretary Hale working alongside Captain Rourke on multiple operations to improve conditions in the volatile region. These operations were massively disrupted by the collapse of the [[Star Empire of Rator]], with Starfleet resources subsequently redirected to mitigate the fallout.
**'''June:''' ''Endeavour'' and the Diplomatic Corps participate in shoring up newly-independent Romulan worlds after the collapse of the [[Star Empire of Rator]], participating in Operation: [[Sundered Wings]] in Agarath in the [[Velorum Sector]].
 
**'''December:''' Endeavour Squadron is established as a Starfleet formation under the command of Fleet Captain Jericho, commanding from the [[USS Triumph]]. The USS ''Pathfinder'', ''Nighthawk'', and ''Independence'' are added to the unit.
===Squadron Formation (2401)===
*'''2401:'''
As the dust settled on the Star Empire of Rator's collapse, the Federation began considering its long-term future in the region. Closer ties to the Romulan Republic and greater potential volatility gave Starfleet more of a vested interest to get involved, and had opened up new opportunities to explore territories to which the Star Empire would never have granted them access. First Secretary Hale initially received orders in late 2400 to resume her mission, but the USS ''Endeavour'' was in the Delta Quadrant at the time, and thus the diplomatic undertaking was delayed.
**'''January-February:''' Endeavour Squadron shores up operations on the Romulan border, prioritising defence of Federation territory and interests.
 
**'''March:''' The [[Dominion]] [[The Lost Fleet|Lost Fleet]] invades the [[Deneb Sector]]. Endeavour Squadron is charged with liberating the [[Izar]] System.  
In late 2400, fresh disruptions in worlds along the spinward Romulan border and coreward borders of the [[Klingon Empire]] altered strategic concerns. Increased raids from pirates based in [[The Triangle]] were joined by political upheaval from Klingon residents of Federation border territories, all suspected to be backed by the House of Mo'Kai. With the Neutral Zone still unstable, Starfleet decided to take a heavier approach than the primarily diplomatic mission of First Secretary Hale, and formed a new squadron to face these challenges.
*** Manipulations of a Changeling infiltrator impersonating USS ''Independence'' CO Commander Vornar sow dissent among the squadron's command staff.
 
***After disobeying orders to protect a task unit of the Cardassian Third Order, Captain Rourke (USS ''Endeavour'') is relieved of command and arrested.
The USS ''Endeavour'' was retained and listed as the lead ship, largely so Starfleet could reap the benefits of their good relations in the area. But a security-focused task group led by Fleet Captain Jericho of the USS ''Triumph'' and including the ''Independence'' and ''Nighthawk'' were integrated into the squadron, with Jericho assigned as squadron commander. First Secretary Hale and her diplomatic mission remained part of the squadron, now based on the USS ''Triumph'' to work more closely with the leadership.
***Fleet Captain Jericho launches the assault on Izar despite depleted ranks of ships and personnel. The result is calamitous, with the USS ''Nighthawk'' heavily damaged and suffering catastrophic losses.
 
***Upon uncovering of the Changeling infiltrator, Captain Rourke assumes command of the USS ''Independence'' and reinforcements from the USS ''Pathfinder'' and Cardassian Third Order. Timely arrival at Izar saves the battle and the system is liberated.
===The Lost Fleet (2401)===
**'''April:''' An inquiry begins into the command breakdown in Deneb. ''Pathfinder, Nighthawk'' and ''Triumph'' are transferred out of the unit.  
In March 2401, the Dominion Lost Fleet launched their attack on the [[Deneb Sector]]. The squadron was charged with the liberation of Izar, the oldest and most populous colony on the frontier, that had fallen early in the invasion to the Dominion. Tensions in the command squad reached a fever pitch throughout the campaign, particularly between Captain Rourke of the USS ''Endeavour'' and Fleet Captain Jericho. The interception of a Jem'Hadar scout by the USS ''Nighthawk'' secured critical intelligence, including the upcoming Breen ambush of a Cardassian strike force sent by the allied Third Order. Rourke argued the Cardassians should be given aid, while Jericho was committed to proceeding to Izar without risking the Dominion realising their plans had been compromised. Despite Jericho's command of the squadron, Rourke ordered ''Endeavour'' to come to the aid of the Cardassians, an act that rescued the strike force but, upon his return, resulted in his arrest.
***Frontier Day disrupts the inquiry at Avalon Fleet Yards and decimates Starfleet's command-level officers. Fleet Captain Jericho assumes responsibility for the disaster at Izar. Cleared of wrong-doing, Matt Rourke is promoted to Commodore and given command of the unit.
 
***Endeavour Squadron is attached to Gateway Station in the Midgard Sector. USS ''Swiftsure'', ''Redemption'' and ''Ranger'' are assigned.
With Rourke relieved of command, morale in the squadron hit critical lows. To try to maintain control, Captain Jericho placed one of his senior officers in command of ''Endeavour'', and had Rourke detained aboard the ''Independence'', trusting Commander Vornar to keep a potentially disruptive figure separate. Although the USS ''Pathfinder'' had not yet reached the squadron, Jericho ordered the immediate attack on Izar, adjusting the plan to compensate; ''Independence'' would fulfil ''Pathfinder's'' original plan to split from the unit to destroy early-warning systems, while ''Nighthawk'' would perform ''Independence's'' battle role and their original duty of locating the command centre for Izar's system-wide defence grid.
**'''June:''' [[We Are the Borg|Resurgent Borg activity]] affects the Midgard Sector, with a Cube breaking up in transwarp, scattering debris across the region. The squadron mobilises to locate debris, shut down the operations of the black market trading Borg technology, and identify the Cube's original mission.
 
**'''August:''' The disappearance of Chancellor Martok is investigated by the USS ''Endeavour''. Nothing conclusive is found. Squadron commander Matt Rourke, ''Endeavour'' CO Karana Valance, and Ambassador Sophia Hale are present on Qo'noS when Toral, son of Duras, ascends to the Chancellorship.  
Near-fatal calamity struck quickly. ''Independence'' held back from the fight, taking no action; in her brig, a Changeling infiltrator attempted to murder Captain Rourke. His survival triggered a confrontation on the bridge, which uncovered a second infiltrator who had been impersonating Commander Vornar himself, who fled. Out of the brig, Rourke assumed command of ''Independence'' and directed the ship to join up with the USS ''Pathfinder'' to summon reinforcements from the Cardassian strike force he had saved, and proceed to Izar.
*** The USS ''Sirius'' is assigned to the squadron, serving as Commodore Rourke's flagship. With the new lead ship, the unit is redesignated 'Sirius Squadron' and given a galaxy-wide expeditionary mandate. The USS ''Liberty'' and ''Tempest'' are also assigned.
 
**'''September:''' [[Underspace]] tunnels across the galaxy [[Labyrinth|open]]. Sirius Squadron responds to the crisis.
Without it, the battle would have been lost. At Izar, the ''Nighthawk'' was disabled early in the fighting. ''Triumph'' engaged in the thickest combat, but with the fighting turning against Starfleet, Fleet Captain Jericho ordered ''Endeavour'' to try to rescue any Starfleet survivors, complete ''Nighthawk's'' mission so a future assault would know the location of the command centre, then withdraw. As ''Triumph'' was disabled by a Breen energy-dampening weapon, Commander Malhotra panicked and ordered ''Endeavour's'' premature withdrawal, only for strategic operations officer Commander Harrian to relieve him of duty and assume command in turn. While Harrian began to salvage this withdrawal, only the timely arrival of Rourke's reinforcements turned the tide.
***''Endeavour'' is pulled through Underspace and stranded in the Delta Quadrant, engaging Hirogen hunters.
 
***''Sirius'' and ''Liberty'' undertake rescue and exploration operations. ''Liberty'' ultimately locates and rescues the missing ''Endeavour''. ''Sirius'' encounters a Cardassian operation to close Underspace, but is unsuccessful in stymying their efforts.
With ''Triumph'' disabled, Rourke assumed command of the battle. Heroic efforts by the ''Nighthawk's'' surviving crew allowed them to complete their mission, and the support wing of fighters and runabouts under ''Endeavour'' XO Commander Shepherd allowed a landing party to seize control of the command centre, and the system-wide defence grid. Despite heavy losses, the squadron snatched victory from the jaws of defeat.
**'''November:''' ''Scylla'' and ''Mercury'' are assigned to the squadron.
 
**'''December:''' ''Blackbird'' conducts an operation to [[The Devil to Pay|prevent illicit technology]] from being traded by the [[Orion Syndicate]] to the Klingon Empire, leading to the uncovering of the last remnants of the Changeling conspiracy within both Starfleet and the Syndicate.
With Izar liberated, Fleet Captain Jericho reassumed command and focused the squadron's efforts to the planet's relief. He placed Captain Rourke again under arrest, as well as Commander Harrian, but once squadron operations at Izar were finished surrendered himself to a Starfleet inquiry into the whole Izar campaign. Despite the definite manipulations of the Changeling impersonating Commander Vornar, there had been a breakdown of command. Before this, however, he ordered ''Endeavour'' to proceed to [[Farpoint Station]] to aid in the defence against the Lost Fleet's final push, placing her under the only command-level officer still qualified to captain her: ''Pathfinder's'' Karana Valance. ''Endeavour'' fought with distinction in the final Battle of Farpoint.
*'''2402:'''
 
**'''January:''' ''Memphis'' is assigned to the squadron.
===Midgard Sector ===
**'''March:''' As the [[Blackout]] phenomenon's effects are felt, Midgard Sector Commander Admiral Morgan calls for a withdrawal of the squadron to Gateway Station. Within weeks, the ships are effectively trapped within a region spanning only several star systems.
The inquiry took some time. Commander Valance was ordered to proceed to Gateway Station, on the Romulan-Federation border, with both ''Endeavour'' and ''Pathfinder''. There, she was informed of the restructuring of the squadron due to take place. ''Triumph'' and Captain Jericho's futures were uncertain. Both ''Independence'' and ''Nighthawk'' had lost their commanders, ''Independence'' to Changeling plot and ''Nighthawk'' to the battle, Commander Kosst sacrificing herself to save her crew. Both were reassigned elsewhere in the Fourth Fleet, requiring a complete restructuring of crews. ''Pathfinder'' was earmarked for a deep-space exploratory mission, and Valance chose instead not to remain in command, but to accept a different offer: captaining ''Endeavour''. While some crew moved on, many of the squadron remained in their original posts or at new assignments.
***SCE Director Commander Cortez begins construction of a graviton catapult in orbit of Midgard III.
 
**'''April:''' The [[Nightfall|invasion]] of the [[Vaadwaur Supremacy]] begins. The Fourth Fleet's restoration of the Pathfinder Project allows orders and intelligence to be spread across the Alpha and Beta Quadrants. Sirius Squadron are given orders to liberate [[Alpha Centauri System|Alpha Centauri]], using the graviton catapult to bypass the Blackout and cross the distance.
With the inquiry's resolution, Matt Rourke was cleared to return to active duty. The fallout of Frontier Day and its impact on the command officers of Starfleet led to a greater need for experienced officers. Rourke was thus, despite the dent to his reputation, advanced to the rank of commodore and assigned as the new squadron commander.
***Within days, they prevail in the Battle of Proxima, liberating the planets of the system's third star. With Vaadwaur forces fortifying around Toliman and Rigil Kentaurus, the squadron begins a weeks-long operation to secure control of neighbouring space.
 
**'''May:''' Squadron forces locate the local Blackout Outpost. An operation is launched to infiltrate and destroy it, under the cover of a direct assault on Toliman/Rigil Kentaurus. Sirius Squadron is grossly outmatched in the Battle of Alpha Centauri, forced to engage superior forces to shield the assault on the outpost and prevent Vaadwaur forces from inflicting atrocities on civilian targets. Starfleet prevails when the Blackout collapses locally, clearing the path for the First Fleet. The Vaadwaur are routed, fleeing through Underspace.
For some months, Rourke led the squadron from Gateway Station. But after the disappearance of Chancellor Martok and the rise to power of Toral, son of Duras, the Klingon Empire turned its eye increasingly to Romulan territory. Several border houses launched raids and invasions into former holdings of the Star Empire, including into the Republic. Recognising the increased strategic significance of the Midgard Sector, both for protecting the Federation's borders and meeting commitments to allies in the Romulan Republic, the squadron was expanded. This expansion included the assignment of the USS ''Sirius'', Commodore Rourke's new command and flagship. In addition to increased capabilities, the assignment of the ''Sirius'' renders squadron command, and thus the unit as a whole, more mobile and able to take on challenges beyond the Midgard Sector more immediately.{{clear}}
***The Blackout collapses across the galaxy. A cease-fire with the Vaadwaur Supremacy ensures their withdrawal to the Delta Quadrant, with Underspace in the Alpha and Beta Quadrants sealed behind them. Sirius Squadron aids in the initial humanitarian relief work following the liberation of Alpha Centauri.
**'''June:''' Galaxy-wide recovery from the Vaadwaur invasion begins. Sirius Squadron provides relief to war-stricken worlds.
**'''October:''' ''Bohr, Tannhäuser, Kortar, and Decimus'' are assigned to the squadron.
{{clear}}

Latest revision as of 15:12, 8 November 2025

Sirius Expeditionary Squadron, also known as Sirius Squadron, is a squadron of the Fourth Fleet centered around the Odyssey-class USS Sirius that serves as a rapid deployment force. While the unit is under the oversight of Vice Admiral Owen Morgan, Director of Squadron Operations, Commodore Matt Rourke serves as the squadron's field commander from the flagship Sirius.

It stands ready to deploy outside or on the fringes of Federation territory at short notice to respond to emerging situations across the galaxy. With multiple versatile and powerful ships at its disposal, the squadron can operate independently and without support for extended periods, and is flexible enough to face a range of missions, including under volatile circumstances where objectives and conditions can quickly change. While this profile often leads Sirius Squadron to respond to geopolitical crises, the unit’s versatility make it equally suited emergent scientific investigations.

The squadron is based out of Gateway Station, in the Midgard Sector, which provides logistical support and operational and administrative leadership.

The HQ unit is organised around the Sirius herself, supported by her attached ship Alhabor. Four additional divisions provide specialist support:

  • Endeavour Division: An administrative grouping including allied Romulan Republic and Klingon Empire assets assigned to the Fourth Fleet. The division exists primarily to maintain unified oversight and communication, each ship answering directly to squadron command, rather than to deploy as a task group.
  • Liberty Science and Exploration Division: Conducts exploratory operations primarily beyond the Federation's borders, expanding Starfleet's understanding of unknown regions. When deployed alongside the squadron, these ships provide support through reconnaissance and advance operations.
  • Memphis Division: Advances the squadron’s knowledge through sustained research, survey missions, and integrated intelligence work. Specialises in follow-up study and the detailed analysis of squadron-priority regions, organisations, or phenomena.
  • Tannhäuser Operations and Outreach Division: Provides engineering, humanitarian, or diplomatic services primarily on the Federation frontier. This division is the most likely to be deployed as a unit and can be sent to whole regions in need, giving disaster relief or building infrastructure. When deployed alongside the squadron, these ships provide logistical support.

In times of need, the squadron may form ad hoc units drawing from any ship to facilitate a specific mission profile.

Since its formation in 2400, the squadron has been at the forefront of some of the Fourth Fleet's most urgent situations of the 25th century, including the Lost Fleet crisis of 2401. It is assigned directly to Fourth Fleet Operations and not one of the fleet's task forces, though is often favoured by Director of Fourth Fleet Intelligence Admiral Alexander Beckett for special assignments.

Staff and Leadership

In addition to starship commanders, Sirius Squadron has an established staff of key officers in leadership positions and providing essential squadron support.

  • Director of Squadron Operations: Vice Admiral Owen Morgan
  • Squadron Commander: Commodore Matt Rourke
    • Tannhäuser Division Commander and Squadron Deputy Commander: Fleet Captain Addison Faust
    • Liberty Division Commander: Captain Elara Galcyon
    • Memphis Division Commander: Captain Khalid El Sayed
    • Chief Strategic Operations Officer: Commander Harrian Cal
    • Commander, Starfleet Corps of Engineers Unit: Commander Isabela Cortez
    • Chief Intelligence Officer: Captain Takahashi Haruto
  • Diplomatic Corps Mission Leader: Ambassador Sophia Hale

Command History

  • January 2400 - January 2401: Captain Matt Rourke
  • January 2401 - March 2401: Fleet Captain Lionel Jericho
  • March 2401 - Present: Commodore Matt Rourke

Composition

Sirius Squadron
USS Sirius
Odyssey-class 		Squadron Flagship Commodore Matt Rourke
Squadron Commander
USS Alhabor
Aquarius-class 		Flagship Embarked Escort & Special Operations Commander Hal Cassidy

Endeavour Division
USS Endeavour
Constitution III-class 		Exploration and Rapid Response Captain Karana Valance
RRW Decimus
Dhelan-class 		Romulan Republic Allied Vessel Commander Aetius Lotharn
IKS Kortar
B'rel-class 		Klingon Empire Allied Vessel HoD Korvath, son of K'marn

Liberty Division
USS Liberty
Sagan-class 		Deep Space Exploration Captain Elara Galcyon
USS Mercury
Obena-class 		First Contact and Diplomatic Outreach Captain Taviel Daragon
USS Tempest
Rhode Island-class 		Archaeological and Cultural Studies Captain Kate Pentecost

Memphis Division
USS Memphis
Sutherland-class 		Research and Development Captain Khalid El Sayed
USS Bohr
Nova-class 		Planetary Surveying and Stellar Charting Captain Juliette Yves
USS Ranger
Intrepid-class 		Reconnaissance Captain Gus Tycho

Tannhäuser Division
USS Tannhäuser
Typhoon-class 		Command Operations and Diplomacy Fleet Captain Addison Faust
Deputy Squadron Commander
USS Scylla
Manticore-class 		Escort and Strategic Operations Captain Teodor Borodin
USS Swiftsure
Echelon-class 		Engineering and Infrastructure Commander Thabo Xhakaza

History

  • December 2399: Diplomatic Corps official Sophia Hale begins a mission to improve Federation relations with factions of the former Romulan Neutral Zone through local diplomacy, humanitarian aid, and cooperation with major Romulan governments. The USS Endeavour, Manticore-class, is the chosen Starfleet platform for this mission before her sudden decommissioning.
  • 2400: After the commissioning of the USS Endeavour NCC-91895, joint operations between Starfleet and the Diplomatic Corps resume.
    • June: Endeavour and the Diplomatic Corps participate in shoring up newly-independent Romulan worlds after the collapse of the Star Empire of Rator, participating in Operation: Sundered Wings in Agarath in the Velorum Sector.
    • December: Endeavour Squadron is established as a Starfleet formation under the command of Fleet Captain Jericho, commanding from the USS Triumph. The USS Pathfinder, Nighthawk, and Independence are added to the unit.
  • 2401:
    • January-February: Endeavour Squadron shores up operations on the Romulan border, prioritising defence of Federation territory and interests.
    • March: The Dominion Lost Fleet invades the Deneb Sector. Endeavour Squadron is charged with liberating the Izar System.
      • Manipulations of a Changeling infiltrator impersonating USS Independence CO Commander Vornar sow dissent among the squadron's command staff.
      • After disobeying orders to protect a task unit of the Cardassian Third Order, Captain Rourke (USS Endeavour) is relieved of command and arrested.
      • Fleet Captain Jericho launches the assault on Izar despite depleted ranks of ships and personnel. The result is calamitous, with the USS Nighthawk heavily damaged and suffering catastrophic losses.
      • Upon uncovering of the Changeling infiltrator, Captain Rourke assumes command of the USS Independence and reinforcements from the USS Pathfinder and Cardassian Third Order. Timely arrival at Izar saves the battle and the system is liberated.
    • April: An inquiry begins into the command breakdown in Deneb. Pathfinder, Nighthawk and Triumph are transferred out of the unit.
      • Frontier Day disrupts the inquiry at Avalon Fleet Yards and decimates Starfleet's command-level officers. Fleet Captain Jericho assumes responsibility for the disaster at Izar. Cleared of wrong-doing, Matt Rourke is promoted to Commodore and given command of the unit.
      • Endeavour Squadron is attached to Gateway Station in the Midgard Sector. USS Swiftsure, Redemption and Ranger are assigned.
    • June: Resurgent Borg activity affects the Midgard Sector, with a Cube breaking up in transwarp, scattering debris across the region. The squadron mobilises to locate debris, shut down the operations of the black market trading Borg technology, and identify the Cube's original mission.
    • August: The disappearance of Chancellor Martok is investigated by the USS Endeavour. Nothing conclusive is found. Squadron commander Matt Rourke, Endeavour CO Karana Valance, and Ambassador Sophia Hale are present on Qo'noS when Toral, son of Duras, ascends to the Chancellorship.
      • The USS Sirius is assigned to the squadron, serving as Commodore Rourke's flagship. With the new lead ship, the unit is redesignated 'Sirius Squadron' and given a galaxy-wide expeditionary mandate. The USS Liberty and Tempest are also assigned.
    • September: Underspace tunnels across the galaxy open. Sirius Squadron responds to the crisis.
      • Endeavour is pulled through Underspace and stranded in the Delta Quadrant, engaging Hirogen hunters.
      • Sirius and Liberty undertake rescue and exploration operations. Liberty ultimately locates and rescues the missing Endeavour. Sirius encounters a Cardassian operation to close Underspace, but is unsuccessful in stymying their efforts.
    • November: Scylla and Mercury are assigned to the squadron.
    • December: Blackbird conducts an operation to prevent illicit technology from being traded by the Orion Syndicate to the Klingon Empire, leading to the uncovering of the last remnants of the Changeling conspiracy within both Starfleet and the Syndicate.
  • 2402:
    • January: Memphis is assigned to the squadron.
    • March: As the Blackout phenomenon's effects are felt, Midgard Sector Commander Admiral Morgan calls for a withdrawal of the squadron to Gateway Station. Within weeks, the ships are effectively trapped within a region spanning only several star systems.
      • SCE Director Commander Cortez begins construction of a graviton catapult in orbit of Midgard III.
    • April: The invasion of the Vaadwaur Supremacy begins. The Fourth Fleet's restoration of the Pathfinder Project allows orders and intelligence to be spread across the Alpha and Beta Quadrants. Sirius Squadron are given orders to liberate Alpha Centauri, using the graviton catapult to bypass the Blackout and cross the distance.
      • Within days, they prevail in the Battle of Proxima, liberating the planets of the system's third star. With Vaadwaur forces fortifying around Toliman and Rigil Kentaurus, the squadron begins a weeks-long operation to secure control of neighbouring space.
    • May: Squadron forces locate the local Blackout Outpost. An operation is launched to infiltrate and destroy it, under the cover of a direct assault on Toliman/Rigil Kentaurus. Sirius Squadron is grossly outmatched in the Battle of Alpha Centauri, forced to engage superior forces to shield the assault on the outpost and prevent Vaadwaur forces from inflicting atrocities on civilian targets. Starfleet prevails when the Blackout collapses locally, clearing the path for the First Fleet. The Vaadwaur are routed, fleeing through Underspace.
      • The Blackout collapses across the galaxy. A cease-fire with the Vaadwaur Supremacy ensures their withdrawal to the Delta Quadrant, with Underspace in the Alpha and Beta Quadrants sealed behind them. Sirius Squadron aids in the initial humanitarian relief work following the liberation of Alpha Centauri.
    • June: Galaxy-wide recovery from the Vaadwaur invasion begins. Sirius Squadron provides relief to war-stricken worlds.
    • October: Bohr, Tannhäuser, Kortar, and Decimus are assigned to the squadron.
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