 Brutus and Cassius have begun their march back to Rome with an alleged 20 legions (although Agrippa correctly guesses that this is an exaggeration) and will seek to remove Octavian.Octavian is initially quite distressed by the threat as he only has four legions but is quickly provided an answer by his mother.Going out to Cisalpine Gaul, Octavian (with some aid from Atia) creates an alliance with Antony in order to defeat Brutus and Cassius.