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

1.
〜に決断を迫る, 〜を強制する
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.
会社の財政難が彼らの手を打たせ、予定よりも早く人員削減を発表しなければならなかった。
•
I didn't want to confront him, but his constant delays forced my hand.
彼と対決したくなかったが、彼の絶え間ない遅延が私に決断を迫った。