Judges 20:2, 8, 11

And the chief of all the people, even of all the tribes of Israel, presented themselves in the assembly of the people of God, four hundred thousand footmen that drew sword.

And all the people arose as one man, saying, We will not any of us go to his tent, neither will we any of us turn into his house.

So all the men of Israel were gathered against the city, knit together as one man.