The Second Great General War was a large series of conflicts between the United Federation of Planets and other major galactic powers, most notably the Rakelli, the Imperial Klingon State, the Romulan Empty Crown and the Borg Collective. Although the war officially started in 2387, there were a number of incidents and events that set the war into motion as far back as the Borg Elimination Incident in 2384. (Star Trek: Unity (fan film series))