21 Apr 1944
  • USS Gar ended her eleventh war patrol. ww2dbase [Main Article | CPC]
  • USS Croaker was commissioned into service with Commander John E. Lee in command. ww2dbase [Main Article | CPC]
  • Operation Chattanooga: Allied aircraft destroyed German rail and other transportation targets. ww2dbase [Main Article | CPC]
  • Allied bombers conducted a raid on Belgrade, Yugoslavia. ww2dbase [CPC]
  • Colonel General Erhard Raus replaced Hans-Valentin Hube as the commander of the German 1.Panzerarmee. Hube was killed in a plane crash on the previous day. ww2dbase [CPC]
Dutch East Indies
  • USS Yorktown (Essex-class) launched raids against installations in the Wakde-Sarmi area of northern New Guinea in support of General Douglas MacArthur's assault on Hollandia (Jayapura), Dutch East Indies. ww2dbase [Main Article | Event | DS]
  • USS Gabilan departed Pearl Harbor, US Territory of Hawaii for her first war patrol; her primary task was to conduct reconnaissance in the Mariana Islands area. ww2dbase [Main Article | Facility | CPC]
  • Barbers Point Naval Air Station: Thirty-seven aircraft (Model F6F-3), 19 aircraft (Model TBF), 77 officers and 92 men of Air Group 20 arrived on board. ww2dbase [Main Article | DS]
  • Japanese troops captured Crete West hill near Imphal, India. ww2dbase [Main Article | CPC]
Japan Pacific Ocean
  • As part of US Navy Carrier Task Force 58, USS Portland screened carriers launching the initial strikes in support of the landings at Hollandia on New Guinea. ww2dbase [Main Article | Event | DS]
United Kingdom
  • No. 486 Squadron RNZAF, flying Tempest V fighters, arrived at RAF Newchurch in southern England, United Kingdom. ww2dbase [Main Article | CPC]
Photo(s) dated 21 Apr 1944
RAF Mustang Mk IIIs of No 19 Squadron based at Ford, Sussex painted with white nose and wing stripes to prevent mis-identification as Me 109s, Apr 21, 1944PB2Y aircraft at San Juan Naval Air Station, Puerto Rico, 21 Apr 1944

21 Apr 1944 Interactive Map

Timeline Section Founder: Thomas Houlihan
Contributors: Alan Chanter, C. Peter Chen, Thomas Houlihan, Hugh Martyr, David Stubblebine
Special Thanks: Rory Curtis

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Famous WW2 Quote
"I have returned. By the grace of Almighty God, our forces stand again on Philippine soil."

General Douglas MacArthur at Leyte, 17 Oct 1944