Judges 20:2, 8, 11

And the chiefs of all the people, of all the tribes of Israel, presented themselves in the assembly of the people of God, 400,000 men on foot that drew the sword.

And all the people arose as one man, saying, “None of us will go to his tent, and none of us will return to his house.

So all the men of Israel gathered against the city, united as one man.