Gaius Julius Caesar (12 July 100 BC – 15 March 44 BC) was a military commander, politician and author at the end of the Roman Republic.
Caesar became a member of the First Triumvirate, and when that broke up, he fought a civil war against Pompey the Great. Winning the war, Caesar became Roman dictator for life. He was killed by his enemies in Rome.
Later rulers of Rome called themselves “Caesar” and this title also became “Kaiser” and “Tsar”.