| Name | Description | 
  | Kazon-Trabe war [1] | The Kazon had been subjects of the Trabe, but liberated themselves in this conflict. The trabe were reduced to wandering nomads by the war. [1] | 
  | Kellerun-T'Lani war [2] | Conflict which ended sometime before mid-2370. The war involved the use of deadly nanobiogenic weapons called Harvesters. The Federation assisted them in destroying these after the war. [2] | 
  | Khom-Yang war [3] | War on Omega IV which paralleled Earth's history in some respects. [3] | 
  | Klingon civil war [4] | Conflict fought in 2367/8 which came about when the Duras family challenged Gowron's appointment as chancellor. The Romulans provided covert help to the Duras forces; when this assistance was cut off, Gowron rapidly claimed victory. [4] | 
  | Koinonian wars [5] | Ancient wars fought on a planet which housed both corporeal and non-corporeal life forms. The wars rendered the corporeal Koinonians extinct, and left a number of booby traps behind. [5] | 
  | Kradin-Vori war [6] | War in which the Vori used mind manipulation techniques to force aliens to fight for them. [6] | 
  | Krios-Valt war [7] | A centuries long conflict which began when two brothers fell out over a woman. The war ended in 2368. [7] | 
  | Kyrian-Vaskan war [8] | Conflict fought between the Kyrians and Vaskans in 2374. Voyager was somewhat involved in the conflict, and many came to blame the Federation ship for the war in later centuries. [8] |