協力した

cooperated; helped

→ 協力
phrase Rare #27,913
cooperated; helped Past form of 協力する, meaning to work together with someone or help with an effort. It is often followed by と to name the person one cooperated with.
JA: 私は彼と協力した。
EN: I cooperated with him.

私は彼と協力した。

I worked with him.

それで工場のみんなは仕方なく協力したことにすれば当局に言い訳がたつでしょう

Then we can tell the authorities that everyone at the factory cooperated because they had no choice, and that should give us a defensible excuse.

— 紅の豚 (1992)

あなたが協力したのでは?

Weren't you the one who helped?

— 嵐の中で (2018)

困っている子供たちのために、私たちは募金活動に協力した。

We helped with the fundraising campaign for children in need.

見つかれば政府が追って来る協力した人間もね

If they find it, the government will come after anyone who helped as well.

— タクシー運転手 約束は海を越えて (2017)

ユダヤ人に協力した者も同罪だ

Those who collaborated with the Jews are equally guilty.

— ジョジョ・ラビット (2019)

そうそのために俺達は協力した

That's right. That's what we worked together for.

— ブレードランナー 2049 (2017)