His family had suffered under the proscriptions of Lucius Cornelius Sulla, but had found favour under the regime of Julius Caesar.
[4] With the establishment of the Second Triumvirate and the launching of the civil war against the Liberatores, in 42 BC Norbanus and another general, Decidius Saxa, were sent by Marcus Antonius and Octavianus with eight legions into Macedonia against the assassins of Julius Caesar.
[5] Ordered to march quickly to Thrace and hold the mountain passes, thus cutting off the Via Egnatia, Norbanus and Saxa met the combined advancing troops of Gaius Cassius Longinus and Marcus Junius Brutus in the neighborhood of Philippi.
[7] When Marcus Antonius and the bulk of the triumvirs' troops arrived, they found Amphipolis well-guarded and Norbanus was left in command of the town.
[9] In reward for his service, in 38 BC Octavianus nominated Norbanus as consul with Appius Claudius Pulcher.