'Men of War' in the Bible

Then shalt thou levy a tribute unto Yahweh - from the men of war, who went forth in the host, one living thing, out of five hundred, - of the human beings, and of the herd, and of the asses and of the flock:

and said unto Moses, Thy servants have reckoned up the sum of the men of war who are in our hand, - and there is not missed from among us, a man!