Battle of Philippi
At first, Brutus pushed back Octavian and entered his army's camp. But to the south, Cassius was defeated by Antony, and committed suicide after hearing a false report that Brutus had also failed. Brutus rallied Cassius' remaining troops and both sides ordered their army to retreat to their camps with their spoils. The battle was essentially a draw, but for Cassius' suicide. This deprived the Liberatores of their best commander.