Judges 20:2, 8, 11

The chiefs of all the people, even of all the tribes of Israel, took their stand in the assembly of the people of God, 400,000 foot soldiers who drew the sword.

Then all the people arose as one man, saying, “Not one of us will go to his tent, nor will any of us return to his house.

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