cross the rubicon

/kɹˈɒs ðə ɹˈuːbɪkən/

/kɹˈɔs ðə ɹˈuːbɪkən/

to cross the rubicon

to irrevocably make a decision or to take an action with consequences

Examples

1. The tensions regarding this issue came to a head when Caesar decided to cross the Rubicon.

2. and he has decided to cross the Rubicon, retake the eternal city, and remake the Roman Empire.

3. It gives us our expression to cross the Rubicon.

4. So he decides to cross the Rubicon and enter Rome.