The Battle of Phase Line Bullet was one of a series of clashes which led to the destruction of the Tawakalna Iraqi Republican Guard Division, on the 26 February 1991, by a simultaneous attack of the 1st and 3rd armoured divisions, the 1st Infantry Division, and the 2nd Armoured Cavalry Regiment. The battle was one of the rare examples of an American armoured force being repulsed by a screen of Iraqi entrenched infantry, APCs, and Iraqi T-72 tanks during Desert Storm. The incident also involved American friendly fire casualties.