Legitimate military target

An image used to brief the press of NATO operations in Serbia in 1999, presented by Joint Staff Vice Director for Strategic Plans and Policy Maj. Gen. Charles F. Wald, U.S. Air Force
Post-strike bomb damage assessment photograph of Obrva Airfield, Serbia used in a Pentagon press briefing, May 5, 1999

A legitimate military target is an object, structure, individual, or entity that is considered to be a valid target for attack by belligerent forces according to the law of war during an armed conflict.