CHRONOS
World History Atlas
Founding Explorer Edition
World War II
1939–1945 · Global Conflict · Axis vs Allies
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World War II: The Global Conflict
World War II (1939–1945) was the deadliest conflict in human history, involving more than 30 countries and resulting in 70 to 85 million fatalities. It began with Germany's invasion of Poland on September 1, 1939, drawing Britain and France into war.
The war was fought across Europe, North Africa, the Pacific, and Asia. The Allies — led by the United States, United Kingdom, Soviet Union, and France — ultimately defeated the Axis powers of Germany, Italy, and Japan, reshaping the entire world order.
Decisive Battles
D-Day, Normandy (1944)
The largest amphibious assault in history opened the Western Front.
Battle of Stalingrad (1942–43)
Soviet victory turned the tide on the Eastern Front.
Battle of Britain (1940)
RAF repelled the Luftwaffe, saving Britain from invasion.
Battle of Midway (1942)
U.S. Navy crushed Japanese naval power in the Pacific.
El Alamein (1942)
Allied forces halted Rommel's push toward the Suez Canal.
Battle of Kursk (1943)
The largest tank battle in history ended German offensive power.
Leaders Who Shaped the War
Winston Churchill
British Prime Minister
Rallied Britain with unmatched oratory and strategic resolve against Nazi Germany.
Franklin D. Roosevelt
U.S. President
Guided America into the war and forged the Allied coalition.
Joseph Stalin
Soviet Leader
Led the USSR's devastating but ultimately victorious war on the Eastern Front.
Adolf Hitler
Nazi Germany
His expansionist ideology triggered the war and led to the Holocaust.
Questions About World War II
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