The Coalition was the name given to one of the two cadres on the planet Turkana IV, site of a failed Earth colony, in 2367. Along with the Turkana IV Alliance, the Coalition was given police powers by the Turkana government in the 2330s, in an attempt to quash the civil war that was raging across the planet. However, the two factions used their powers to eliminate the remaining cadres and eventually the government itself.
By 2367, led by Hayne, the Coalition controlled half of the colony, and had at least three thousand troops. Ishara Yar was among their members. In that year, the Coalition assisted the USS Enterprise-D in tracking and recovering crewmembers of the Arcos, captured by the Alliance following the destruction of that vessel. Their assistance disguised an attempt to sabotage the Alliance defense systems, and wipe out their enemy.