Now Zebah and Zalmunna were in Karkor, and their armies were with them, about 15,000 men, all who remained of all the army of the children of the east, for those who had fallen were 120,000 men who drew sword. Bible other translations

“about 15,000 men,” Although Gideon had killed many, he was still outnumbered 50 to 1.

“those who had fallen.” That is “fallen” in battle; that is, were killed.

Commentary for: Judges 8:10