the operation, the corps was placed directly under General Douglas MacArthur's command, rather than being assigned to the US Eighth Army. Advanced elements of I Corps headquarters subsequently moved to Morotai Island in March 1945, followed by the remainder of the headquarters the following month. From there, they directed a series of amphibious landings that were carried out by the 7th and 9th Divisions at Tarakan, North Borneo and Balikpapan through May, June and July. In all locations, the objectives were captured, albeit against stronger-than-expected resistance in some cases, with commensurately heavy casualties, after which the Australians pushed further inland, carrying out mopping up operations. On Tarakan, the airfield was captured five days after the landing, but it was badly damaged and ultimately filled no role in subsequent operations. Meanwhile, in North Borneo, after operations to secure Labuan and Brunei had proved successful, a follow up landing was made around Weston, with a subsequent advance towards Beaufort, which was captured after heavy engagement resulted in over 100 Japanese killed. By mid-July, the main resistance around Balkipapan and the coastal areas had been overcome, and the defending Japanese had withdrawn into the hills further inland. Following the cessation of hostilities in August, the corps assumed responsibility for facilitating the Japanese surrender on Borneo and in making preparations for returning the area to Dutch colonial control in the post war period. This included undertaking local and protective patrols to maintain law and order and to secure Japanese soldiers who had not yet surrendered. As part of the demobilisation process, I Corps headquarters closed on 15 September 1945, at which time its constituent divisions were transferred to the direct command of Advanced Land Headquarters. In the post war period, no corps-level formations have been raised by the Australian Army. Subordinate formations In early 1941, when I Corps commenced operations in the Middle East, it consisted of the following formations: 6th Infantry Division (16th, 17th and 19th Infantry Brigades) 7th Infantry Division (18th, 21st and 25th Infantry Brigades) 9th Infantry Division (20th, 24th and 26th Infantry Brigades) In July – September 1943, I Corps consisted of the following formations: 5th Infantry Division (15th, 17th, 29th Infantry Brigades, US 162nd Infantry Regiment) 7th Infantry Division (18th, 21st, 25th Infantry Brigades, US 503rd Parachute Regiment 9th Infantry Division (20th, 24th and 26th Infantry Brigades) 11th Infantry Division (6th Infantry Brigade) 4th Infantry Brigade In the final