during the day and making sorties at night. The Americans gradually developed tactics for clearing the caves by using flamethrower teams supported by artillery and machine guns. The operation was marred by inter-service controversy when Marine General Holland Smith, dissatisfied with the performance of the 27th Division, relieved its commander, Army Major General Ralph C. Smith. However, Holland Smith had not inspected the terrain over which the 27th was to advance. Essentially, it was a valley surrounded by hills and cliffs under Japanese control. The 27th took heavy casualties and eventually, under a plan developed by Ralph Smith and implemented after his relief, had one battalion hold the area while two other battalions successfully flanked the Japanese. By 6 July, the Japanese had nowhere to retreat. Saitō made plans for a final suicidal banzai charge. On the fate of the remaining civilians on the island, Saito said, "There is no longer any distinction between civilians and troops. It would be better for them to join in the attack with bamboo spears than be captured." At dawn of 7 July, with a group of 12 men carrying a red flag in the lead, the remaining able-bodied troops — about 4,000 men — charged forward in the final attack. Behind them came the wounded, with bandaged heads, crutches, and barely armed. The Japanese surged over the American front lines, engaging both Army and Marine units. The 1st and 2nd Battalions of the 105th Infantry Regiment were almost destroyed, losing well over 650 killed and wounded. The two battalions fought back, as did the Headquarters Company, 105th Infantry, and supply elements of 3rd Battalion, 10th Marine Artillery Regiment, resulting in over 4,300 Japanese killed and over 400 dead US soldiers with more than 500 more wounded. For their actions during the 15-hour Japanese attack, three men of the 105th Infantry Regiment were awarded the Medal of Honor: Lt. Col. William O'Brien, Cpt. Ben L. Salomon, Pvt. Thomas A. Baker, all posthumously. The attack on 7 July would be the largest Japanese Banzai charge in the Pacific War. By 16:15 on 9 July, Admiral Turner announced that Saipan was officially secured. Saitō, along with commanders Hirakushi and Igeta, committed suicide in a cave. Vice-admiral Chuichi Nagumo, the naval commander who led the Japanese carriers at Pearl Harbor, also committed suicide in the closing stages of the battle. He had been in command of the