Battle of Alesia
Caesar engaged in the Gallic Wars (58–50 BC), which led to his conquest of Gaul beyond Gallia Narbonensis. When the Helvetii, a federation of tribes from what is now Switzerland, planned a migration to the Atlantic coast through Gaul, Caesar went to Geneva and forbade the Helvetii to move into Gaul. While he went to Gallia Cisalpina to collect three other legions, the Helvetii attacked the territories of the Aedui, Ambarri, and Allobroges, three Gallic tribes, which called for Caesar’s help. Caesar and his Gallic allies defeated the Helvetii. The Gallic tribes then asked for Caesar to intervene against an invasion by the Suebi, a Germanic tribe. Caesar defeated the Suebi. In 57 BC he intervened in intra-Gallic conflicts and marched on the Belgae of northern Gaul. From then on he conquered the Gallic peoples one by one. His successes in Gaul brought Caesar political prestige in Rome and great wealth through the spoils of wars and the sale of war captives as slaves.
Porcia (wife of Brutus)
In 52 BC, Julius Caesar's Gallic Wars came to an end, but he refused to return to Rome, despite the Senate's demands that he lay down his arms. Cato personally detested Caesar, and was his greatest enemy in the Senate; Cato's political faction, the Optimates (also known as the Boni), believed that Caesar should return to Rome, in order for the Optimates to strip him of his property and "dignitas", and permanently exile Caesar. In 49 BC, Caesar crossed the Rubicon with his army, thus declaring war, beginning the Great Roman Civil War. Both Cato and Bibulus allied with Gnaeus Pompeius Magnus against Caesar. Though both Boni hated Pompey, he did not pose the threat to their faction that Caesar did. Bibulus commanded Pompey's navy in the Adriatic Sea. He captured a part of Caesar's fleet, although this was a generally insignificant as Caesar went on to decisively defeat Pompey at the Battle of Pharsalus. Bibulus died in 48 BC following Pompey's defeat, leaving Porcia a widow.