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1962

The Century 21 Exposition, the first world's fair in the United States since World War II, opened in Seattle

The Century 21 Exposition, the first world's fair in the United States since World War II, opened in Seattle.

1915

First World War: Britain, France and Russia signed a secret treaty promising territory to Italy if it joined the war on

First World War: Britain, France and Russia signed a secret treaty promising territory to Italy if it joined the war on their side.

1942

World War II: The Battle of Midway, a major battle of the Pacific War, began with a massive Japanese offensive on Americ

World War II: The Battle of Midway, a major battle of the Pacific War, began with a massive Japanese offensive on American forces on Midway Atoll.

1941

World War II: German minister of foreign affairs Joachim von Ribbentrop presented a declaration of war to the Soviet amb

World War II: German minister of foreign affairs Joachim von Ribbentrop presented a declaration of war to the Soviet ambassador Vladimir Dekanozov in Berlin.

1916

First World War: Around 55,000 workers in Berlin went on strike to protest against the trial of anti-war campaigner Karl

First World War: Around 55,000 workers in Berlin went on strike to protest against the trial of anti-war campaigner Karl Liebknecht.

1914

World War I: Adhering to the terms of the Treaty of London, the United Kingdom declared war on Germany in response to…

World War I: Adhering to the terms of the Treaty of London, the United Kingdom declared war on Germany in response to the latter's invasion of Belgium.

1939

Second World War: The Royal Navy lost its first warship in the war when German submarine U-29 torpedoed and sank…

Second World War: The Royal Navy lost its first warship in the war when German submarine U-29 torpedoed and sank HMS Courageous.

1944

World War II: Finland, the Soviet Union, and the United Kingdom signed the Moscow Armistice to end the Continuation War.

World War II: Finland, the Soviet Union, and the United Kingdom signed the Moscow Armistice to end the Continuation War.

1916

World War I: The Supreme War Command was established to oversee the armed forces of all the Central Powers.

World War I: The Supreme War Command was established to oversee the armed forces of all the Central Powers.

1947

American financier and presidential adviser Bernard Baruch first described the post–World War II tensions between the So

American financier and presidential adviser Bernard Baruch first described the post–World War II tensions between the Soviet Union and the United States as a "cold war".

1945

World War II: The photograph Raising the Flag on the Three-Country Cairn (pictured) was taken after German troops withdr

World War II: The photograph Raising the Flag on the Three-Country Cairn (pictured) was taken after German troops withdrew to Norway at the end of the Lapland War.

1945

World War II: The U

World War II: The U.S. Army liberated Dachau, the first Nazi concentration camp, and killed German prisoners of war.

1943

Second World War: A decisive Soviet victory against German forces at the Battle of Kursk gave the Red Army the…

Second World War: A decisive Soviet victory against German forces at the Battle of Kursk gave the Red Army the strategic initiative for the rest of the war.

1944

World War II: The Greek People's Liberation Army won the Battle of Meligalas and began the execution of many prisoners…

World War II: The Greek People's Liberation Army won the Battle of Meligalas and began the execution of many prisoners of war and civilians.

1918

World War I: The Central Powers' defeat at the Battle of Dobro Pole played a role in the Bulgarian withdrawal from the…

World War I: The Central Powers' defeat at the Battle of Dobro Pole played a role in the Bulgarian withdrawal from the war and led to the subsequent liberation of Vardar Macedonia.

1945

Second World War: British and Canadian forces concluded the Liberation of Arnhem in the Netherlands from German occupati

Second World War: British and Canadian forces concluded the Liberation of Arnhem in the Netherlands from German occupation.

1917

World War I: Several French army corps began a massive assault against the German-occupied Chemin des Dames ridge, south

World War I: Several French army corps began a massive assault against the German-occupied Chemin des Dames ridge, south of Laon, France.

1942

World War II: Captured French general Henri Giraud escaped from German captivity in the Königstein Castle

World War II: Captured French general Henri Giraud escaped from German captivity in the Königstein Castle.

1915

World War I: Hit by ground fire, French aviation pioneer Roland Garros (pictured) landed his aircraft behind enemy lines

World War I: Hit by ground fire, French aviation pioneer Roland Garros (pictured) landed his aircraft behind enemy lines and was taken prisoner by German forces.

1942

World War II: German and Italian forces began a large-scale counter-insurgency operation in occupied Yugoslavia

World War II: German and Italian forces began a large-scale counter-insurgency operation in occupied Yugoslavia.