Augustus
At first, Octavian was the junior partner in the triumvirate. Lepidus was more experienced in government, and Mark Antony was a fine military leader. The triumvirate defeated Brutus and Cassius at the Battle of Philippi, 42 BC, largely due to Antony's leadership. Then they split the leadership of the Republic three ways. Antony took the east, Lepidus took Spain and part of North Africa, and Octavian took Italy.