established fact; fait accompli
Refers to a situation that has already happened and cannot be undone, often used in legal, political, or interpersonal contexts where someone creates a fact to force acceptance.
He created a fait accompli and then reported it to his boss.
既成事実として認めざるを得ない。
We have no choice but to accept it as an established fact.
The company created a fait accompli before explaining it to employees.
That decision has already become an established fact.
The government advanced its plan by accumulating one fait accompli after another.
They tried to turn the occupation into a fait accompli.