force someone's hand
US /fɔrs ˈsʌm.wʌnz hænd/
UK /fɔrs ˈsʌm.wʌnz hænd/

1.
forcer la main à quelqu'un, contraindre quelqu'un à agir
to make someone do something they do not want to do, or to make them do it sooner than they had intended
:
•
The company's financial difficulties forced their hand, and they had to announce layoffs earlier than planned.
Les difficultés financières de l'entreprise les ont forcés à agir, et ils ont dû annoncer des licenciements plus tôt que prévu.
•
I didn't want to confront him, but his constant delays forced my hand.
Je ne voulais pas l'affronter, mais ses retards constants m'ont forcé la main.