Starfleet has mobilized Battle Group Omega to the Gamma Orionis Sector Block to counter the renewed threat of the Borg in 2409. And, behind all of this, a mysterious, ancient presence. At the same time, the Undine, aggrieved at what appear to be incursions into fluidic space by Alpha Quadrant powers, have begun infiltrating the major powers and driving them to conflict. And, after a period of relative inactivity, the Borg have begun to encroach on the Alpha Quadrant once more, starting with an attack on the Vega colony. The Cardassians, still recovering from the Dominion War, stir up trouble near Deep Space 9, as does a resurgent Terran Empire. The Romulans, directionless and adrift after the destruction of their home world in 2387, continue to intrigue amongst themselves – a conflict which inevitably draws the Federation in to the machinations of the once-proud Star Empire. The rise of a new Chancellor, J’mpok, sees the Khitomer Accords torn up, and an aggressive campaign of Klingon expansion underway. The year is 2409, and the Federation and the Klingon Empire are once again at war.

The Enterprise crew was forced to face the Scimitar without the support of the fleet, however, when Shinzon ambushed the Enterprise in the Bassen Rift (Star Trek Nemesis). In 2379, Battle Group Omega was diverted to sector 1045 to rendezvous with the Enterprise, which was returning from Romulan space with the Reman warbird Scimitar, under the command of Shinzon, in pursuit.

Battle group omega scimitar