The ICP-Borg War was a conflict between the Imperial Commonwealth of Planets and the Borg Collective waged from 2377 to 2381. The war's foundations were being laid when the Borg received knowledge of the Federation's collapse after the Dominion War, deeming it a vulnerable target for assimilation now that it had no central authority. The Collective prepared a large fleet of cubes, spheres, and probes to invade the Alpha Quadrant in force, only to be met by the presence of the ICP. This triggered a long war between the ICP and Borg forces in the Alpha Quadrant. The war lasted for 4 years in a stalemate situation before the Emperor of the ICP contacted the Borg Queen to arrange a ceasefire and peace treaty.