Definitions for "friendly fire"
Keywords:  sean, lennon, troops, ally, album
Weapons fire{9}, such as artillery or aerial bombardment, from one's own forces; -- used mostly when troops do damage or cause casualties among their own forces; as, the tank was hit by friendly fire.
Hitting team mates with offensive fire by accident. In Campaign this causes no damage to friendly units but will result in a deduction from earned Supply and Command points. In Free Mission mode, Friendly Fire can by turned on (off by default) as an option.
fire that injures or kills an ally
A visible flame or glow started voluntarily, under control, and in its intended place.