The term fragging is used to describe the deliberate killing or attempted killing by a soldier of a fellow soldier, usually a superior officer or non-commissioned officer. The word was coined by military personnel of the United States during the Vietnam War, when such killings were most often attempted with a fragmentation grenade, sometimes making it appear as though the killing was accidental or during combat with the enemy. The term fragging is now often used to encompass any means used to deliberately and directly cause the death of military colleagues.