3d Battalion, 23d Marines was assigned the G-Day missions of (1) providing security in the division zone forward of the Saudi defensive berm, which was located on the Saudi-Kuwait border, prior to G-Day; (2) passing through the breach lanes, and: (3) clearing its zone of action to support the attack north, and (4) screening to the northeast in order to allow 3d Battalion, 10th Marines (3/10) to establish artillery firing positions to provide preparation fires for offensive operations. Phase One was the conduct of the route reconnaissance by TOWs, heavy machine guns (HMG), combat engineers, snipers, and artillery reconnaissance assets. Phase Two was the introduction of one motorized infantry company, the battalion command element, and the 81 mm mortar platoon in the forward sector. The motorized company would be placed in a blocking position oriented northwest, facing possible Iraqi units being flushed out by 2nd LAR screening to the northwest. The teams were tasked to position themselves between the Iraqi defenses and friendly artillery to screen the Iraqi forward defensive belt, and orient to the northeast. Phase Three would be the movement of the artillery units to their firing positions on 23 February 1991, G-1, under the cover of darkness.