Battle of the Binary Stars
- May 11, 2256, at an unnamed binary star system near the Federation/Klingon border (DIS: "Battle of the Binary Stars")
- First major conflict (and encounter) between United Federation of Planets and Klingon Empire since the Battle of Donatu V 14 years prior
- Began the Federation-Klingon War
- Forces
- Federation: 12 starships
- Klingon: At least 26 starships, representing each of the 24 Great Houses at the time
- Federation suffered severe losses, with few casualties on the Klingon side
- Battle also served to unite the Houses and end the internal turmoil that had been occupying the Empire since the ascension of Chancellor Khorkal in 2165
| Name | Registry | Class | Outcome |
|---|---|---|---|
| USS T'Plana-Hath | NCC-1004 | Destroyed | |
| USS Shenzhou | NCC-1227 | Walker | Destroyed |
| USS Shran | NCC-1413 | Destroyed | |
| USS Yeager | NCC-1437 | Destroyed | |
| USS Europa | NCC-1648 | Destroyed | |
| USS Clarke | NCC-1661 | Destroyed | |
| USS Edison | NCC-1683 | Destroyed | |
| USS Dana | |||
| USS Earhart | |||
| USS Kerala | |||
| USS Ride | |||
| USS Sioux |