力を尽くした

did one's best

→ 力
phrase Rare #34,249
did one's best The past-tense form of 力を尽くす, used when someone made every effort or did all they could.
JA: 彼女は家族を守るために力を尽くした。
EN: She did her best to protect her family.

力を尽くしたかね

Did you give it your all?

— The Wind Rises (2013)

トムはメアリーを助けるために力を尽くした。

Tom did everything he could to help Mary.

彼はこの十年間平和のために力を尽くした。

He has worked tirelessly for peace over the past ten years.

力を尽くしたが反応がなかった

I did everything I could, but there was no response.

— ROMA/ローマ (2018)