1 March - The 21st Marines, with no changes in attachments, continued the attack at 0830 with the 2d and 3d Bns abreast, 3d on the right making the main effort. The 12th Marines, all battalions now ashore, reinforced by Corps artillery, fired a fifteen minute preparation in support of the attack, followed by a rolling barrage lifting 100 yards every eight minutes for 300 yards. Direct Support destroyers fired a thirty minute preparation from 0800 to 0830, deepening the fires of the 12th Marines. The 2d Bn, 21st Marines which had attacked to the north the day before pivoted on its right and attacked to the northeast. Both the 2d and 3d Bns, the former effectively employing tanks, progressed rapidly initially, moving well ahead of the assault units of the 5th Marine Division on the left. At 0930 the 9th Marines was ordered to move one battalion forward to TA 199 R, S T. The 1st Bn, 9th Marines moved forward and had closed in its assembly area at 1125. At 1015 the 3d Bn, 9th Marines was committed in the gap between the 1st Bn, 21st Marines, which was still held up by a pocket of enemy resistance to its front, and the 2d Bn, 21st Marines. The 1st Bn, 21st Marines was ordered to mop the pocket of resistance to its front. The situation at 1015 was as shown on Enclosure B (6), Situation at 1015, 1 March. The 3d Bn, 9th Marines advanced against light resistance and prior to 1500 had arrived at the division left boundary. By this time the 1st Bn, 21st Marines, attacking generally north to mop up the pocket of resistance to its front, had mopped up the enemy pocket and also arrived at the division left boundary on the left of the 3d Bn, 9th Marines. By Corps order, at 1500 the boundary between the 3d and 5th Marine Divisions was modified to make the position held by the 1st Bn, 21st Marines inclusive to the 5th Marine Division. The 5th Marine Division was ordered to extend to the northeast and relieve the 1st Bn, 25th Marines. By 1545 the 2d and 3d Bns, 21st Marines had been held up by enemy resistance, the 3d Bn by heavy small arms fire from an enemy position east of CR-325 (TA 201-B) and the 2d by hostile machine gun and antitank gunfire sweeping Airfield No. 3. At 1545 it was decided to launch another coordinated attack with regiments abreast, the 9th Marines taking over the zone of action of the right battalion of the 21st Marines, with the 3d Bn 21st Marines and one tank company attached. The 3d Tank Bn less one company remained attached to the 21st Marines. The situation at 1545 was as shown on Enclosure B (7), Situation at 1545, 1 March. At 1645 the attack was launched, the 9th Marines passing the 1st Bn, 9th Marines though the 3d Bn, 21st Marines which took up a reserve position in the vicinity of MOTOYAMA village. The 2d Bn, 9th Marines was placed in division reserve in the vicinity of TA 200- K. The attack was preceded by a five minute preparation by the division artillery and direct support destroyers, which was followed by a rolling barrage. Gains made were negligible against heavy enemy resistance, particularly in front of the 9th Marines. Prior to 1800, the 5th Marine Division had relieved the 1st Bn, 21st Marines which was placed in regimental reserve in a defensive position west of MOTOYAMA village. At the conclusion of operations at 1810, the situation was as shown on Enclosure B (8), Situation at 1810, 1 March. At 1900 Co C, 21st Marines was attached to the 2d Bn 21st Marines to assist the 2d Bn in tying in with the 1st Bn, 9th Marines on the right.