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1941

World War II: The Continuation War between the Soviet Union and Finland, supported by Nazi Germany, began

World War II: The Continuation War between the Soviet Union and Finland, supported by Nazi Germany, began.

1941

World War II: Soviet planes bomb Kassa, Hungary (now Košice, Slovakia), giving Hungary the impetus to declare war the ne

World War II: Soviet planes bomb Kassa, Hungary (now Košice, Slovakia), giving Hungary the impetus to declare war the next day.

1919

The Treaty of Versailles is signed, ending the state of war between Germany and the Allies of World War I

The Treaty of Versailles is signed, ending the state of war between Germany and the Allies of World War I.

1917

World War I: Russia launches an offensive against Austria-Hungary to capture Galicia, its final offensive of the war.

World War I: Russia launches an offensive against Austria-Hungary to capture Galicia, its final offensive of the war.

1921

World War I: U.S. President Warren G. Harding signs the Knox–Porter Resolution formally ending the war between the…

World War I: U.S. President Warren G. Harding signs the Knox–Porter Resolution formally ending the war between the United States and Germany.

1944

World War II: Largest Banzai charge of the Pacific War at the Battle of Saipan.

World War II: Largest Banzai charge of the Pacific War at the Battle of Saipan.

1944

World War II: Continuation War: Finland wins the Battle of Tali–Ihantala, the largest battle ever fought in northern…

World War II: Continuation War: Finland wins the Battle of Tali–Ihantala, the largest battle ever fought in northern Europe. The Red Army withdraws its troops from Ihantala and digs into a defensive p�

1944

World War II: Hideki Tōjō resigns as Prime Minister of Japan because of numerous setbacks in the war effort.

World War II: Hideki Tōjō resigns as Prime Minister of Japan because of numerous setbacks in the war effort.

1917

World War I: The Corfu Declaration, which leads to the creation of the post-war Kingdom of Yugoslavia, is signed by…

World War I: The Corfu Declaration, which leads to the creation of the post-war Kingdom of Yugoslavia, is signed by the Yugoslav Committee and Kingdom of Serbia.

1944

World War II: Operation Spring near Caen is one of the bloodiest days for the First Canadian Army during the war.

World War II: Operation Spring near Caen is one of the bloodiest days for the First Canadian Army during the war.

1945

World War II: HMS Vestal is the last British Royal Navy ship to be sunk in the war.

World War II: HMS Vestal is the last British Royal Navy ship to be sunk in the war.

2015

One World Observatory at One World Trade Center opens

One World Observatory at One World Trade Center opens.

1941

World War II: Following the coup d'état against Iraq Crown Prince 'Abd al-Ilah earlier that year, the United Kingdom lau

World War II: Following the coup d'état against Iraq Crown Prince 'Abd al-Ilah earlier that year, the United Kingdom launches the Anglo-Iraqi War to restore him to power.

1940

World War II: Norwegian, French, Polish and British forces recapture Narvik in Norway

World War II: Norwegian, French, Polish and British forces recapture Narvik in Norway. This is the first Allied infantry victory of the War.

1958

Memorial Day: The remains of two unidentified American servicemen, killed in action during World War II and the Korean W

�The remains of two unidentified American servicemen, killed in action during World War II and the Korean War respectively, are buried at the Tomb of the Unknown Soldier in Arlington National Cemetery.

1916

World War I: Battle of Jutland: The British Grand Fleet engages the High Seas Fleet in the largest naval battle of the w

World War I: Battle of Jutland: The British Grand Fleet engages the High Seas Fleet in the largest naval battle of the war, which proves indecisive.

1944

World War II: Battle of Normandy: At Ardenne Abbey, members of the SS Division Hitlerjugend massacre 23 Canadian prisone

World War II: Battle of Normandy: At Ardenne Abbey, members of the SS Division Hitlerjugend massacre 23 Canadian prisoners of war.

1775

American Revolutionary War: The war begins during the Battles of Lexington and Concord with a victory of American minute

American Revolutionary War: The war begins during the Battles of Lexington and Concord with a victory of American minutemen and other militia over British forces, later referred to as the "shot heard�

1945

World War II: The Red Army begins the final assault on German forces around Berlin, with nearly one million troops fight

World War II: The Red Army begins the final assault on German forces around Berlin, with nearly one million troops fighting in the Battle of the Seelow Heights.

1944

World War II: Allied forces start bombing Belgrade, killing about 1,100 people

World War II: Allied forces start bombing Belgrade, killing about 1,100 people. This bombing fell on the Orthodox Christian Easter.