1. Crossing the Rubicon: It showed Caesar's ambition and determination, as he chose to defy Rome's laws and risk civil war for personal gain. 
2. The Gallic Wars: Through his leadership and tactical skills, he demonstrated his ability as a military commander, ultimately expanding Rome's territory. 
3. His assassination: Caesar's growing power and disregard for the Roman Senate led to his downfall, reflecting the danger of concentrating too much power in one person.
You are a historian studying the life of Julius Caesar. Analyze three critical events in his life and provide insights into what these events reveal about him.