United States
Washington, D.C.
Show on map →Flags 1939–1945
- …1939United States (48 stars)
- simplified version (without arms)
Course of events
- 23 August 1939
Neutral / non-belligerent
Not at war; neutral until December 1941 (aid to Britain from 1941 under Lend-Lease).
- 8 December 1941
Allies
Declared war on Japan on 8 Dec 1941 after Pearl Harbor; Germany and Italy declared war on the US on 11 Dec 1941 and the US reciprocated the same day.
Events involving this country
- 11 Mar 1941Lend-Lease Act
- 9 Aug 1941Atlantic Charter
- 7 Dec 1941Japanese attack on Pearl Harbor
- 7 Jan 1942Battle of Bataan
- 18 Apr 1942Doolittle Raid
- 4 May 1942Battle of the Coral Sea
- 4 Jun 1942Battle of Midway
- 7 Aug 1942Guadalcanal campaign
- 8 Nov 1942Operation Torch
- 17 Nov 1942Tunisian campaign
- 14 Jan 1943Casablanca Conference
- 19 Feb 1943Battle of the Kasserine Pass
- 10 Jul 1943Allied invasion of Sicily (Operation Husky)
- 1 Aug 1943Operation Tidal Wave (Ploiești raid)
- 17 Aug 1943Schweinfurt–Regensburg mission
- 9 Sept 1943Salerno landings (Operation Avalanche)
- 20 Nov 1943Battle of Tarawa
- 28 Nov 1943Tehran Conference
- 17 Jan 1944Battle of Monte Cassino
- 22 Jan 1944Battle of Anzio (Operation Shingle)
- 6 Jun 1944Normandy landings and Operation Overlord
- 15 Jun 1944Battle of Saipan
- 22 Jun 1944Battle of Cherbourg
- 25 Jul 1944Operation Cobra
- 12 Aug 1944Falaise pocket
- 15 Aug 1944Operation Dragoon — landings in southern France
- 19 Aug 1944Liberation of Paris
- 25 Aug 1944Gothic Line (Operation Olive)
- 12 Sept 1944Battle of Aachen
- 17 Sept 1944Operation Market Garden
- 19 Sept 1944Battle of Hürtgen Forest
- 23 Oct 1944Battle of Leyte Gulf
- 16 Dec 1944Battle of the Bulge (Ardennes Offensive)
- 31 Dec 1944Operation Nordwind
- 1 Jan 1945Operation Bodenplatte
- 4 Feb 1945Yalta Conference
- 13 Feb 1945Bombing of Dresden
- 19 Feb 1945Battle of Iwo Jima
- 7 Mar 1945Capture of the Ludendorff Bridge at Remagen
- 9 Mar 1945Bombing of Tokyo, 9–10 March 1945 (Operation Meetinghouse)
- 1 Apr 1945Battle of Okinawa
- 6 Apr 1945Spring 1945 offensive in Italy (Operation Grapeshot)
- 16 Jul 1945Trinity nuclear test
- 17 Jul 1945Potsdam Conference
- 6 Aug 1945Atomic bombings of Hiroshima and Nagasaki
- 15 Aug 1945Surrender of Japan
Data completeness: borders c. 1938, status at country level; occupation zones, annexations and front lines as approximate snapshots. Units and offensives: selected, incomplete sets; archive: only items with a confirmed licence, still being added.