Octavian and Mark Antony defeated Cassius at Philippi in Macedonia in 42 BC. Antony, an important supporter of and military commander for Julius Caesar during his conquest of Gaul and subsequent civil war, fought alongside Octavian against the forces of Cassius in Macedonia, with Octavian battling those led by Brutus in a separate engagement during the first week of October that year.

1. Losing of Macedonia 42 bc
• Octavian and Mark Antony defeated Cassius at Philippi in Macedonia.
• The first occurred in the first week of October; Brutus faced Octavian, while
Antony's forces fought those of Cassius.
• Antony was an important supporter of and military commander for Julius
Caesar during his conquest of Gaul and subsequent civil war.
• Source:http://www.britannica.com/EBchecked/topic/354319/Macedonian-
Wars