1944 2 January U.S. Army troops land at Saidor, New Guinea. 31 January-7 February U.S. forces assault and capture Kwajelein and Majuro Atolls in the Marshalls. 16-17 February Task Force 58 strikes Truk, revealing weakness of that base. 17-22 February U.S. forces assault and capture Eniwetok Atoll in the Marshalls. 29 February-28 March U.S. forces assault and capture the main islands of the Admiralties. 6 March 1st Marine Division lands near Talasea on New Britain in the Bismarcks. 22 April U.S. Army troops land at Aitape and Hollandia in northern New Guinea, beginning drive up the coast. 6 June Allied troops invade the continent of Europe in Normandy. 15 June-9 July U.S. forces assault and capture Saipan in the Marianas. 19-20 June Battle of the Philippine Sea. Japanese naval air arm suffers decisive defeat. 21 July-10 August U.S. forces assault and capture Guam in the Marianas. 24 July-1 August V Marine Amphibious Corps assaults and captures Tinian in the Marianas. 30 July Westward drive reaches end of New Guinea at Sansapor Point. 15 September U.S. Army troops assault and capture Moratai, Netherlands East Indies. 15-30 September U.S. forces assault and capture Peleliu and Anguar in the Palaus. 23 September U.S. Army troops seize Ulithi Atoll in the Western Carolines. 10 October First carrier raid on Okinawa. 20 October U.S. Army troops land on Leyte in the Philippines. 23-26 October Battle of Leyte Gulf. Elimination of the Japanese surface fleet as a major threat. 25 October CinCPOA issues Joint Staff Study outlining plans for the Okinawa operation (ICEBERG). 24 November Saipan-based B-29's bomb Tokyo in the first attack on the enemy capitol by land-based planes. 15 December U.S. Army troops invade Mindoro in the Philippines. 25 December Leyte declared secure. 1945 6 January Tenth Army issues Tentative Operation Plan 1-45 for ICEBERG. 9 January U.S. Army troops land on Luzon in the Philippines. 25 January First support mission flown by Marine dive bombers in the Philippines. 19 February-16 March V Marine Amphibious Corps assaults and captures Iwo Jima in the Volcano-Bonins.
11 March General Buckner puts Tenth Army Operation Plan 1-45 into effect by dispatch. 21 March Western Islands Attack Group carrying assault troops of the 77th Infantry Division sorties from Leyte Gulf for the opening phase of ICEBERG. 24 March Southern Tractor Flotilla carrying assault troops of the XXIV Corps sorties from Leyte Gulf for ICEBERG.
Planes and battleships of Task Force 58 open the preliminary bombardment of Okinawa.
25 March Northern Tractor Flotilla carrying assault troops of the III Amphibious Corps sorties from Ulithi for ICEBERG. 26-31 March 77th Infantry Division assaults and captures Kerama Retto and Keise Shima. 27 March Transport and covering forces of the Joint Expeditionary Force sortie from Leyte Gulf and Ulithi for ICEBERG.
Demonstration Group carrying troops of the 2d Marine Division leaves Saipan.
1 April Tenth Army makes an unopposed landing on the Hagushi beaches of Okinawa. 2 April Forward elements of the 7th Infantry Division reach the eastern coast of Okinawa, severing the island. 6-7 April First of ten major Kamikaze attacks on ships in Okinawan waters. 7 April Planes of Task Force 58 sink the Japanese super-battleship Yamato, a cruiser, and four destroyers, ending all chance of a sea attack on Okinawa. 9-10 April 3/105 of the 27th Infantry Division assaults and captures Tsugen Shima, the only defended position in the Eastern Islands. 10 April 27th Infantry Division lands on Okinawa to reinforce the XXIV Corps. 16-21 April 77th Infantry Division assaults and captures Ie Shima. 19 April XXIV Corps makes an all-out attack against the outer ring of Shuri defenses. 20 April The end of organized resistance on Motobu Peninsula in the 6th Marine Division zone of action. 30 April 77th Infantry Division relieves the 96th Infantry Division in southern Okinawa. 1 May 1st Marine Division relieves the 27th Infantry Division in southern Okinawa. 4 May 27th Infantry Division relieves 6th Marine Division in northern Okinawa. 4-6 May XXIV Corps repulses major Japanese counterattack. 7 May IIIAC takes over the western sector of the Tenth Army front in southern Okinawa. 8 May First elements of the 6th Marine Division enter the lines on the southern front. 9-10 May 96th Infantry Division replaces the 7th Infantry Division on the eastern coast. 11 May Tenth Army all-out attack on the inner Shuri defenses. 17 May Admiral Turner relieved by Admiral Hill as Commander Task Force 51. General Buckner now directly responsible to Admiral Spruance for operations of Tenth Army. 21 May 7th Infantry Division recommitted on the east coast to encircle Shuri. 27 May Third Fleet relieves Fifth Fleet and General Buckner now directly responsible to CinCPOA for operations of Tenth Army. 30 May-4 June Bulk of the Japanese Thirty-second Army withdraws under cover of rain from the Shuri bastion to new positions in the Kiyamu Peninsula. 31 May 5th Marines capture Shuri Castle. 3-4 June 8th Marine Combat Team secures Iheya Shima. 4 June 6th Marine Division assaults Oroku Peninsula. 9 June 8th Marine Combat Team secures Aguni Shima. 18 June General Buckner killed watching progress of 8th Marines' first attack on Okinawa; General Geiger assumes temporary command of Tenth Army. 21 June End of organized resistance on Okinawa. 22 June Official flag-raising at Tenth Army Headquarters marking capture of Okinawa. 23 June General Stilwell assumes command of Tenth Army.
24-30 June FMF Reconnaissance Battalion secures Kume Shima. 30 June Completion of the mop-up sweep of southern Okinawa. 1 July Task Force 31 dissolved by CinCPOA; General Stilwell assumes responsibility for defense and development of Okinawa Gunto. 5 July Philippines campaign declared ended. 4 August 27th Infantry Division reaches Hedo Misaki ending three and a half month mopping-up action in northern Okinawa. 6 August First atomic bomb dropped on Hiroshima. 9 August Second atomic bomb dropped on Nagasaki. 10 August Japan sues for peace. 14 August End of war in the Pacific. 2 September Formal surrender of the Japanese Empire on board the Missouri in Tokyo harbor. 7 September General Stilwell accepts the surrender of Japanese Ryukyus garrisons signifying the beginning of American political hegemony in Okinawa.
Transcribed and formatted for HTML by Jerry Holden for the HyperWar Foundation