The Roman Empire: In The First Century . Special Features . Timeline

53-50 BC - Julius Caesar conquers Gaul.
The Gauls resist Caesar's army and revolt, led by a young Gallic chieftain, Vercingetorix. The siege of Alesia forces them to surrender and Gaul is won. Julius Caesar turns his attention to seizing supreme power in Rome itself.

49 BC - Caesar crosses the Rubicon. Civil war begins.
After his victory in Gaul, Caesar is so popular that the nervous Senate calls on him to resign and disband his army or risk being declared an 'Enemy of the State'. Caesar decides to march on Rome and crosses the Rubicon River with a standing army, throwing the empire into civil war.

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