Earth-Romulan War
Before the War
- Initial conflict considered as officially beginning July 22, 2155, upon destruction of Calder II science station and attacks on Alpha Centauri III and Tarod IX
- Prior aggression begun at first contact between United Earth and Romulan Star Empire
- April 17, 2152: First contact, unnamed system, collision by Enterprise NX-01 with cloaked Romulan minefield (ENT: "Minefield")
- Mid-November 2154: Failed attempt at provoking strife between various Sol-local powers through covert attacks by telepresence drone technology (ENT: "Babel One", "United", "The Aenar")
- February-May 2155: United Earth covert operations intended to derail Romulan warp 7 project (ENT: The Good That Men Do)
- February 23, 2155: Warp suicide run by Romulan vessel on Coridan to cut off Coalition access to dilithium (ENT: The Good That Men Do)
- July 15, 2155: Destruction of ECS Horizon during initial telecapture experiments (ENT Novel: Kobayashi Maru)
- Prior aggression begun at first contact between United Earth and Romulan Star Empire
- Conflict initially involved full Coalition forces, but vulnerability of non-UE navies to Romulan telecapture led to withdrawal by mid-2156; thus usually considered and referred to as the Earth-Romulan War (ENT Novel: Beneath the Raptor's Wing)
- Though this was technically an abrogation of the Coalition Compact, no actions beyond attempts at exerting diplomatic pressure were taken in response (ENT Novel: Beneath the Raptor's Wing)
- This withdrawal highlighted the weakness of the Coalition, leading to the formation of the Federation as a much stronger, more binding astropolitical entity following the end of the Earth-Romulan War
Core forces
Allied forces
United Earth
Major Events
July 22, 2155
- First non-covert action against Earth/Coalition forces
- Attack on Alpha Centauri III, Calder II, Tarod IX; attempt at capturing Enterprise NX-01 in Gamma Hydra sector via telecapture technology through attack on SS Kobayashi Maru (ENT Novel: Kobayashi Maru, Beneath the Raptor's Wing)
- Results
July 28, 2155
- Construction begins on warp-field detection grids as developed by Vulcan intended to provide defense in lieu of direct Vulcan Defense Fleet involvement (ENT Novel: Beneath the Raptor's Wing)
- Initial construction in core systems of Coalition member nations — Sol, Alpha Centauri, Kuy'va, Tellar — expanding to colonial holdings of all nations in the following months (ENT Novel: Beneath the Raptor's Wing)
October 16, 2155
- First Battle of Deneva
- First proof of failure of Vulcan warp detection grid (ENT Novel: Beneath the Raptor's Wing)
- Later revealed to be through use of high-sublight attack vessels launched from outside detection perimeter (ENT Novel: Beneath the Raptor's Wing)
- Forces
- Coalition
- TSC Miracht (ENT Novel: Beneath the Raptor's Wing)
- USS Yeager (NCC-176) (ENT Novel: Beneath the Raptor's Wing)
- Coalition
- Results
- Destruction of Deneva Colony and occupation of Deneva (ENT Novel: Beneath the Raptor's Wing)
- Coalition losses: TSC Miracht; USS Yeager (ENT Novel: Beneath the Raptor's Wing)
November 8, 2155
- First Battle of Berengaria VII
- Forces
- United Earth
- Discovery NX-04 (ENT Novel: Beneath the Raptor's Wing)
- Romulan Star Empire
- IRW Dhivael (ENT Novel: Beneath the Raptor's Wing)
- United Earth
- Results
- Destruction of Berengaria VII settlements (ENT Novel: Beneath the Raptor's Wing)
- United Earth losses: Discovery NX-04 (ENT Novel: Beneath the Raptor's Wing)
November 17-18, 2155
- Battle of Threllvia IV
- Forces
- Coalition
- IGS Ka'Thelan Krotus (ENT Novel: Beneath the Raptor's Wing)
- Unstated other Andorian Imperial Guard transport vessels (ENT Novel: Beneath the Raptor's Wing)
- Coalition
- Results
- Destruction of Threllvia IV colony and occupation of Threllvia IV (ENT Novel: Beneath the Raptor's Wing)
- Coalition losses: IGS Ka'Thelan Krotus (ENT Novel: Beneath the Raptor's Wing)
Late November 2155
- Battle of Valakis
- Conflict in open space near the planet Valakis (ENT Novel: Beneath the Raptor's Wing)
- Forces
- United Earth
- Results
- Unknown number of casualties aboard USS Yorktown (ENT Novel: Beneath the Raptor's Wing)
- Romulan vessel destroyed (ENT Novel: Beneath the Raptor's Wing)
November 26, 2155
- Battle of Altair VI
- First confirmed identification of Romulan sublight tactic (ENT Novel: Beneath the Raptor's Wing)
- Forces
- United Earth
- Romulan Star Empire
- Single mothership with fleet of sublight fighter vessels
- Results
- Romulan attack on Altair VI repelled with no damage to colony (ENT Novel: Beneath the Raptor's Wing)
- Romulan losses: 10-vessel sublight attack squadron (ENT Novel: Beneath the Raptor's Wing)
Late 2155 - Early 2156
- Other unstated attacks implied (ENT Novel: Beneath the Raptor's Wing)
February 11, 2156
- Romulan aggression wanes in response to preparation for second front at Haakona (ENT Novel: Beneath the Raptor's Wing)
March 8, 2156
- Independent confirmation by Earth tests of viability of sublight assault tactic (ENT Novel: Beneath the Raptor's Wing)
March 10, 2156
- Battle of Andor
- Evolution of Romulan sublight tactic including disabling of detection grid during initial onslaught
- Forces
- Coalition
- Challenger NX-03 (ENT Novel: Beneath the Raptor's Wing)
- USS Yorktown (NCC-156) (ENT Novel: Beneath the Raptor's Wing)
- IGS Weytahn (ENT Novel: Beneath the Raptor's Wing)
- Romulan Star Empire
- IRW Dhivael (ENT Novel: Beneath the Raptor's Wing)
- Coalition
- Results
- Attempted attack on Andorian capital cities prevented (ENT Novel: Beneath the Raptor's Wing)
- Self-destruction of Challenger NX-03 while under telecapture control led to mutual destruction of IRW Dhivael (ENT Novel: Beneath the Raptor's Wing)
- Attempted attack on Andorian capital cities prevented (ENT Novel: Beneath the Raptor's Wing)
March 11, 2156
- Invasion of Capory
- Results
- United Earth colony on Capory destroyed; no survivors (ENT Novel: Beneath the Raptor's Wing)
March 14, 2156
- Invasion of Draken IV
- Results
- United Earth science station on Draken IV destroyed; no survivors (ENT Novel: Beneath the Raptor's Wing)
April 2, 2156
- Second Battle of Berengaria VII
- United Earth strike to retake Berengaria VII from Romulan forces
- Forces
- United Earth
- Enterprise NX-01
- USS Intrepid (NCC-40)
- USS Carolina (NCC-160)
- USS Olympus (NCC-165)
- USS Ptolemy (NCC-167)
- USS Zefram Cochrane (NCC-168)
- USS Lovell (NCC-170)
- USS Stephen Decatur (NCC-172)
- USS Essex (NCC-173)
- USS Archon (NCC-179)
- USS Probert (NCC-211)
- USS Dykstra (NCC-214)
- USS Valley Forge (NCC-216)
- USS Franklin Roosevelt (NCC-217)
- 180 MACO ground combatants
- Romulan Star Empire
- Unknown; at least 9 vessels (ENT Novel: Beneath the Raptor's Wing)
- United Earth
- Subluminal approach from magnetopause to Berengaria VII by fleet (ENT Novel: Beneath the Raptor's Wing)
- Linear formation to minimize detection (ENT Novel: Beneath the Raptor's Wing)
- Upon arrival, MACO dropships launched from Daedalus vessels while fleet engaged Romulan forces in orbit (ENT Novel: Beneath the Raptor's Wing)
- Total engagement under 12 hours (ENT Novel: Beneath the Raptor's Wing)
- Results
- United Earth losses: USS Olympus (NCC-165), USS Ptolemy (NCC-167), USS Zefram Cochrane (NCC-168), USS Stephen Decatur (NCC-172), USS Probert (NCC-211), USS Dykstra (NCC-214), USS Valley Forge (NCC-216); half of MACO ground troops KIA (ENT Novel: Beneath the Raptor's Wing)
- Romulan losses: Majority of forces lost, remainder forced into retreat (ENT Novel: Beneath the Raptor's Wing)
- Berengaria VII retaken by United Earth (ENT Novel: Beneath the Raptor's Wing)
April-June 2156
- Few offenses by Romulan Star Empire against Earth due to occupation with newly-belligerent Haakonan forces (ENT Novel: Beneath the Raptor's Wing)
June 17-20, 2156
- Second Battle of Altair VI
- United Earth task force rendezvouses with Andorian and Tellarite forces
- Forces
- Coalition
- Endeavour NX-06
- USS Cooper
- USS Maryland
- USS Montgomery
- USS Tripoli
- Additional United Earth forces (ENT Novel: Beneath the Raptor's Wing)
- Numerous Andorian and Tellarite vessels (ENT Novel: Beneath the Raptor's Wing)
- Estimate at least 25 vessels total, comprising ~10 United Earth ships, ~10 Andorian ships, ~5 Tellarite ships
- "At least a dozen" vessel structures survived second attack in whole or in part, including all mentioned above, but "more than half" were Andorian or Tellarite; say closer to fifteen in total
- In addition, "several Andorian warships" and "at least one...Tellarite vessel" self-destructed on telecapture
- Romulan Star Empire
- First fleet (ENT Novel: Beneath the Raptor's Wing)
- Second fleet (ENT Novel: Beneath the Raptor's Wing)
- Coalition
- June 17th: Surprise attack by Romulan patrol fleet during Coalition rendezvous
- Attack repelled with some casualties, but forces a delay in fleet dispatch for repair
- June 20th: Second attack by battle squadron alerted by initial patrol fleet
- Majority of Coalition losses caused by second encounter
- Results
- Coalition losses: USS Montgomery, USS Tripoli, majority of Andorian and Tellarite vessels (ENT Novel: Beneath the Raptor's Wing)
- Romulan losses: Total loss of all vessels (ENT Novel: Beneath the Raptor's Wing)
- Attack is first clear and blatant evidence of greater ability of United Earth vessels to weather telecapture attacks than Andorian or Tellarite (ENT Novel: Beneath the Raptor's Wing)
June 20, 2156
- Second Battle of Deneva
- End result of continued push by United Earth task force from Berengaria VII to Deneva to retake planet from Romulan forces
- Rendezvous of Coalition forces with United Earth task force immediately prior to offensive
- Forces
- Coalition
- Enterprise NX-01
- USS Intrepid (NCC-40)
- USS Kearsarge (NCC-154)
- USS Adirondack (NCC-157)
- USS Carolina (NCC-160)
- USS Lovell (NCC-170)
- USS Essex (NCC-173)
- USS Shepard (NCC-175)
- USS Archon (NCC-179)
- USS Franklin Roosevelt (NCC-217)
- One additional United Earth vessel
- ~500 MACO ground combatants
- Number conjecture by suffering "hundreds" of losses and "dozens" of injuries
- IGS Weytahn
- 21 additional Andorian and Tellarite vessels
- Romulan Star Empire
- Unknown
- Coalition
- Upon arrival, MACO dropships and shuttles launched from all United Earth vessels while fleet engaged Romulan forces in orbit (ENT Novel: Beneath the Raptor's Wing)
- Total engagement under 12 hours (ENT Novel: Beneath the Raptor's Wing)
- Results
- Coalition losses: USS Kearsarge (NCC-154), USS Adirondack (NCC-157), USS Shepard (NCC-175), half of Andorian and Tellarite vessels crippled or destroyed; hundreds of MACO ground troops KIA (ENT Novel: Beneath the Raptor's Wing)
- Romulan losses: Majority of forces lost, remainder forced into retreat (ENT Novel: Beneath the Raptor's Wing)
- Deneva retaken by Coalition (ENT Novel: Beneath the Raptor's Wing)
- Battle of Tau Ceti IV
- Romulan forces stationed at Altair VI and Deneva, considered lesser holdings, diverted to Tau Ceti in advance of United Earth push (ENT Novel: Beneath the Raptor's Wing)
- Tau Ceti seen as a more valuable target and potential beachhead (ENT Novel: Beneath the Raptor's Wing)
- Forces
- Coalition
- Atlantis NX-05
- Large combined Earth, Andorian, and Tellarite fleet similar in size to other task forces
- Romulan Star Empire
- Largest Romulan fleet in the war at that time (ENT Novel: Beneath the Raptor's Wing)
- Coalition
- Results
- Starfleet contingent losses near-total; Andorian and Tellarite contingents withdraw soon after engagements (ENT Novel: Beneath the Raptor's Wing)
- Tau Ceti IV bombarded, occupied by Romulan forces (ENT Novel: Beneath the Raptor's Wing)
June 21, 2156
- Andorian Empire and United Planets of Tellar withdraw from conflict against Romulan Star Empire (ENT Novel: Beneath the Raptor's Wing)
2160
- Official surrender of the Romulan Star Empire (ENT Novel: To Brave the Storm)
- Establishment of Romulan Neutral Zone (ENT Novel: To Brave the Storm; TOS: "Balance of Terror")
- General withdrawal of Romulan diplomatic and military influence in surrounding space until mid-2260s (VAN Novel: Summon the Thunder; TOS: "Balance of Terror")