52b.c. Caesar builds two sets of fortifications 42 miles and lays Siege to Alesia . With approximately 42,000 men, Caesar besieges 100,000 Gauls within the fort and holds out 250,000 men in a relief force on the outside. This ends war.
Caesar still must serve his one year of Pro-consular governorship before going back to Rome.
Faces a big decision (Sulla) whether or not to declare civil war on Rome.