喧嘩を

a fight; an argument

→ 喧嘩
phrase Uncommon #8,415
a fight; an argument 喧嘩をする means “to have a fight” or “to argue.” を marks 喧嘩 as the object of the verb, so 喧嘩を usually appears before verbs such as する or やめさせる.
JA: 弟と喧嘩をしてしまった。
EN: I ended up having a fight with my younger brother.

私はトムジョン喧嘩を実際見たことなかった

I had never actually seen Tom and John get into a fight.

その夫婦は喧嘩をしたが、すぐに仲直りをした

The couple had a fight, but they made up soon afterward.

つまらぬ事で喧嘩をするな

Don't fight over trivial things.

彼とつまらない事で喧嘩をした

I had an argument with him over something trivial.

私は昨日兄と喧嘩をした

I had a fight with my older brother yesterday.

彼はあんなやつ喧嘩をするほど馬鹿じゃないはずだ

He shouldn't be stupid enough to pick a fight with someone like that.

私は喧嘩を終わらせたい

I want to end the fight.

喧嘩をしたのは事故の前日

The fight was the day before the accident.

— 落下の解剖学 (2023)