Philippi (Rebellion of Brutus).
Fought B.C. 42, between the Republicans, under Brutus and Cassius, 100,000 strong, and the army of the Triumvirs, about equal in numbers, under Octavius and Mark Antony. Brutus on the right repulsed the legions of Octavius, and penetrated into his camp. Cassius, however, was overthrown by Antony, and would have been overwhelmed but for the arrival of aid from the successful right wing. The action was renewed on the second day, when the Triumvirs were completely victorious, and the Republican army dispersed. Brutus committed suicide on the field of battle.