Today is the anniversary of the day in 49 B.C. when Julius Caesar - noting, Iacta alea esto ("The die is cast") - crossed the Rubicon River with his legions to march on Rome in defiance of both the Senate and Roman law, which forbade any general from crossing the Rubicon and entering Italy proper with a standing army. To do so was treason. This tiny stream would reveal Caesar's intentions and mark the point of no return. Born around 100 B.C. into one of the oldest patrician families of the republic, Caesar began his political career as a member...