1944

January
9th British and Indian troops recapture Maungdaw in Burma
31st U.S. troops invade Kwajalein in the Marshall Islands


February
1st – 7th U.S. troops capture Kwajalein and Majura Atolls in the Marshall Islands
17th – 18th U.S. carrier-based planes destroy the Japanese naval base at Truk in the Caroline Islands
20th U.S. carrier-based and land-based planes destroy the Japanese base at Rabaul
23rd U.S. carrier-based planes attack the Mariana Islands
24th Merrill's Marauders begin a ground campaign in northern Burma


March
5th Gen. Wingate's groups begin operations behind Japanese lines in Burma
15th Japanese begin offensive toward Imphal and Kohima


April
17th Japanese begin their last offensive in China, attacking U.S. air bases in eastern China
22nd Allies invade Aitape and Hollandia in New Guinea


May
27th Allies invade Biak Island, New Guinea


June
5th The first mission by B-29 Superfortress bombers occurs as 77 planes bomb Japanese railway facilities at Bangkok, Thailand
15th U.S. Marines invade Saipan in the Mariana Islands
15th – 16th The first bombing raid on Japan since the Doolittle raid of April 1942, as 47 B-29s based in Bengel, India, target the steel works at Yawata
19th The "Marianas Turkey Shoot" occurs as U.S. carrier-based fighters shoot down 220 Japanese planes, while only 20 American planes are lost


July
8th Japanese withdraw from Imphal
19th U.S. Marines invade Guam in the Marianas
24th U.S. Marines invade Tinian
27th American troops complete the liberation of Guam


August
3rd U.S. and Chinese troops take Myitkyina after a two month siege
8th American troops complete the capture of the Mariana Islands


September
15th U.S. troops invade Morotai and the Paulaus


October
11th U.S. air raids against Okinawa
18th Fourteen B-29s based on the Marianas attack the Japanese base at Truk
20th U.S. Sixth Army invades Leyte in the Philippines
23rd – 26th Battle of Leyte Gulf results in a decisive U.S. Naval victory
25th The first suicide air (Kamikaze) attacks occur against U.S. warships in Leyte Gulf. By the end of the war, Japan will have sent an estimated 2,257 aircraft. "The only weapon I feared in the war," Adm. Halsey will say later


November
11th Iwo Jima bombarded by the U.S. Navy
24th Twenty-four B-29s bomb the Nakajima aircraft factory near Tokyo


December
15th U.S. troops invade Mindoro in the Philippines
17th The U.S. Army Air Force begins preparations for dropping the Atomic Bomb by establishing the 509th Composite Group to operate the B-29s that will deliver the bomb