Forum Romanum
Outlines of Roman History: Civil War Between Pompey and Caesar
William Morey, in his 1901 textbook, explains in this passage the conflict between Pompey and Caesar that rages across the Roman provinces.
National Geographic
National Geographic: 49 Bce: Caesar Crosses the Rubicon
"Crossing the Rubicon" is a modern-day idiom meaning to commit to a particular plan or course of action that cannot be reversed. The phrase refers to how Julius Caesar crossed the Rubicon river and became embroiled in civil war in 49...