fait accompli
/ˌfeɪt əˈkɒmpli,French fɛt akɔ̃pli/
noun: fait accompli; plural noun: faits accomplis

1. a thing that has already happened or been decided before those affected hear about it, leaving them with no option but to accept it.

"the results were presented to shareholders as a fait accompli"
Origin
mid 19th cent.: from French, literally ‘accomplished fact’.