Julius Caesar definition A Roman general and dictator in the
first century b.c. In military campaigns to secure Roman rule
over the province of Gaul, present-day France, he gained much
prestige. The Roman senate, fearing his power, ordered him to
disband his army, but Caesar refused, crossed the Rubicon River,
returned to Rome with his army, and made himself dictator. On a
subsequent campaign in Asia, he reported to the senate, “I came,
I saw, I conquered.” Caesar was assassinated by his friend
Brutus and others on the ides of March in 44 b.c.