Romans were superstitious and Julius was waiting at the river for some kind of sign from the heavens to tell him what to do. When the sign appeared (whatever that was) he said the words and crossed the river. The phrase itself is alluding to a game played with dice. Another translation would be "Let the die be cast!" or "Let the games begin!"
"The die have been cast" - for those who haven't been studying their latin.
what does it mean?
i think in this context, something like "there is no going back now"
Romans were superstitious and Julius was waiting at the river for some kind of sign from the heavens to tell him what to do. When the sign appeared (whatever that was) he said the words and crossed the river. The phrase itself is alluding to a game played with dice. Another translation would be "Let the die be cast!" or "Let the games begin!"