en_tn_condensed/jdg/20/39.md

General Information:

This verse continues to give background information that the writer inserted to explain to the readers how the ambush defeated the Benjamites. (See: rc://en/ta/man/jit/writing-background)

would turn from the battle

"would retreat from the fight"

they are defeated before us

This can be stated in active form. Alternate translation: "we have defeated them" (See: rc://en/ta/man/jit/figs-activepassive)