Answer:
On an inscription at the riverfront of the Rubicon River, was written, that soldiers, flags, or weapons are not allowed beyond the river
However, knowing that he would have suffered death if he went into Rome alone, and that by crossing the river, the legion and himself are sentenced to death (or could cause a coup) automatically, therefore, by leading about 5,000 men across the Rubicon, then he (and his legion) have cast the die, (their goal is not for Julius Caeser or them to be killed) and it will eventually rest with a side up, therefore, their cause of action has started (which is to go into Rome and preserve themselves) and even if they stop (stop the die) there is still an outcome (punishment/coup), and therefore, there is no going back
Explanation:
