"And Caesar crossed the Rubicon and burned his boats! "
TODAY this phrase "crossing the Rubicon" refers to reaching a point of no return. In reality the Rubicon river in northern Italy was of little consequence except for the fact that it marked the official border between Italy and Gaul (now largely in France). In 49 B.C. Julius Caesar was the Governor of Gaul and coming to the end of his governorship he was aware that he was about to lose his power.