- January 6th - Soviets advance into Poland.
- January 22nd - Allied landings in Anzio.
- January 27th - End of siege of Leningrad.
- March 19th - Hungary occupied by German Army.
- April 10th - Soviets capture Odessa.
- May 9th - Sevastopol falls to Soviets.
- June 4th - Rome captured by Allies.
- June 6th - Operation Neptune/Overlord - Allied invasion of Normandy.
- June 27th - US Army captures Cherbourg.
- July 3rd - Soviets re-capture Minsk.
- July 7th - Japanese defeat on Saipan.
- July 9th - Allies capture Caen.
- July 20th - German assassination attempt on Hitler fails.
- July 21st - US landings on Guam.
- July 25th - Beginning of Operation Cobra - Allied breakout from Normandy.
- July 28th - Soviets take Brest-Litovsk.
- August 4th - Allies liberate Florence.
- August 15th - Operation Anvil - Allied landings in South of France.
- August 25th - Allies liberate Paris.
- August 28th - Liberation of Marseilles/Toulon.
- August 30th - Germans abandon Bulgaria.
- August 31st - Soviets capture Bucharest.
- September 2nd - Pisa liberated.
- September 3rd - Antwerp/Brussels liberated.
- September 5th - Soviets declare war on Bulgaria.
- September 12th - Le Havre liberated.
- September 17th - Operation Market Garden - failed airborne assault in Holland.
- September 22nd - Boulogne liberated.
- September 26th - Estonia occupied by Soviets.
- September 28th - Liberation of Calais.
- October 1st - Soviets enter Yugoslavia.
- October 4th - Allies land in Greece.
- October 14th - Athens liberated.
- October 20th - Liberation of Belgrade.
- October 21st - Allies capture Aachen.
- October 23rd - Soviets enter East Prussia.
- November 4th - Surrender of Axis forces in Greece.
- November 24th - French capture Strasbourg.
- December 16th - German attack through Ardennes - Battle of the Bulge begins.
- December 26th - US troops hold Bastogne - Ardennes offensive stalls.