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)
• Conflict initially involved full Coalition forces, but vulnerability of non-UE navies to Romulan telecapture led to withdrawal by late-2155; thus usually considered and referred to as the Earth-Romulan War (ENT Novel: Beneath the Raptor's Wing)

Core forces

• United Earth
• Romulan Star Empire

Allied forces

United Earth

• Andorian Empire
• Confederacy of Vulcan
• Haakona
• United Planets of Tellar

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
  • Destruction of Calder II science station, Tarod IX outpost, Alpha Centauri III fleet yards (ENT Novel: Beneath the Raptor's Wing)
  • Coalition losses: DDV T'Jal; DDV Toth (ENT Novel: Beneath the Raptor's Wing)

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)
• 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

• 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)
• 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)
• 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
    • USS Yorktown (NCC-156)
• 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
    • Columbia NX-02
    • USS Heinlein (NCC-164)
    • USS Kon-Tiki (NCC-166)
• 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)
• 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)

March 11, 2156

• Invasion of Capory
• Results
  • United Earth colony on Capory destroyed; no survivors (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")