Field Artillery Battalion (105 mm) 210th Field Artillery Battalion (105 mm) 108th Engineer Combat Battalion 108th Medical Battalion 33rd Cavalry Reconnaissance Troop (Mechanized) Headquarters, Special Troops, 33rd Infantry Division Headquarters Company, 33rd Division 733rd Ordnance Light Maintenance Company 33rd Quartermaster Company 33rd Signal Company Military Police Platoon Band 33rd Counterintelligence Corps Detachment During its combat operations, divisions usually had various units attached in support of it and other organic units detached. Where those attachments and detachments are well-documented for the divisions that fought in the European Theater of Operations, documentation is poorer for those divisions which fought in the Pacific. Reorganized When the US Army reorganized from the "square" (4 regiments to a division) to "triangular" (3) concept, the 132nd Infantry Regiment was separated and was sent to New Caledonia as part of Task Force 6814 where it became part of the Americal Division. The division was left with the 123rd, 130th, and 136th Infantry Regiments. The 33rd Tank Company was sent to the Philippines as Company B of the 192nd Tank Battalion prior to Pearl Harbor and it was captured at Bataan. Action in the Pacific Theater The 33rd Infantry Division arrived in Hawaii on 12 July 1943. While guarding installations, it received training in jungle warfare. On 11 May 1944, it arrived in New Guinea where it received additional training. The 123rd Infantry Regiment arrived at Maffin Bay on 1 September, to provide perimeter defense around the Wakde Airdrome and in the Toem–Sarmi sector. The 123rd was relieved on 26 January 1945. Elements of the 33rd arrived at Morotai, on 18 December 1944 and landings were made on the west coast of the island on 22 December, without opposition and defensive perimeters were established. Aggressive patrols were sent out which encountered scattered resistance. The 33rd then landed at Lingayen Gulf, on Luzon, on 10 February 1945, and relieved the 43rd Infantry Division in the Damortis–Rosario Pozorrubio area, over the period 13–15 February. The division drove into the Caraballo Mountains on 19 February, toward its objective, Baguio, the summer capital of the Philippines and the headquarters of General Tomoyuki Yamashita. Fighting against a fanatical enemy entrenched in the hills, the 33rd took Aringay on 7 March, Mount Calugong on 8 April, and Mount Mirador on 25 April. Baguio and Camp John Hay fell on 26 April, under the concerted attack of the 33rd and the 37th Infantry Divisions. Manuel