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germany invades poland.
The Invasion of Poland, known in Poland as the September Campaign or the 1939 Defensive War, and in Germany as the Poland Campaign or Fall Weiss, was a joint invasion of Poland by Germany, the Soviet Union, the Free City of Danzig, and a small Slovak contingent that marked the beginning of World War II. -
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Battle of the Atlantic
The Battle of the Atlantic was the longest continuous military campaign in World War II, running from 1939 to the defeat of Germany in 1945. -
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Battle of France
The Battle of France, also known as the Fall of France, was the German invasion of France and the Low Countries during the Second World War. -
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Battle of Britain
The Battle of Britain was a military campaign of the Second World War, in which the Royal Air Force defended the United Kingdom against large-scale attacks by Nazi Germany's air force, the Luftwaffe. It has been described as the first major military campaign fought entirely by air forces. -
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Operation Barbarossa
Operation Barbarossa was the code name for the Axis invasion of the Soviet Union, which started on Sunday, 22 June 1941, during World War II. -
Japan’s attack on Pearl Harbor
a devastating surprise attack by Japanese forces on December 7, 1941. Just before 8 a.m. on that Sunday morning -
Battle of Stalingrad
The Battle of Stalingrad (23 August 1942 - 2 February 1943) was the largest confrontation of World War II, in which Germany and its allies fought the Soviet Union for control of the city of Stalingrad (now Volgograd) in Southern Russia. -
Doolittle Raid
The Doolittle Raid, also known as the Tokyo Raid, on Saturday, April 18, 1942, was an air raid by the United States on the Japanese capital Tokyo and other places on the island of Honshu during World War II, the first air operation to strike the Japanese Home Islands. -
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Battle of Midway
The Battle of Midway was a decisive naval battle in the Pacific Theater of World War II which occurred between 4 and 7 June 1942, only six months after Japan's attack on Pearl Harbor and one month after the Battle of the Coral Sea. -
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First Battle of El Alamein
The First Battle of El Alamein was a battle of the Western Desert Campaign of the Second World War, fought in Egypt between Axis forces of the Panzer Army Africa and Allied forces of the Eighth Army. -
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Guadalcanal Campaign
The Guadalcanal Campaign, also known as the Battle of Guadalcanal and codenamed Operation Watchtower by American forces, was a military campaign fought between 7 August 1942 and 9 February 1943 on and around the island of Guadalcanal in the Pacific theater of World War II. It was the first major offensive by Allied forces against the Empire of Japan. -
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Second Battle of El Alamein
The Second Battle of El Alamein was a battle of the Second World War that took place near the Egyptian railway halt of El Alamein. -
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Operation Torch
Operation Torch was a Anglo–American invasion of French North Africa, during the North African Campaign of the Second World War. Torch was the debut of the mass involvement of US troops in the European–North African Theatre. -
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The Battle of Kursk
The Battle of Kursk was a Second World War engagement between German and Soviet forces on the Eastern Front near Kursk in the Soviet Union, during July and August 1943. -
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Allied invasion of Sicily
The Allied invasion of Sicily, codenamed Operation Husky, was a major campaign of World War II, in which the Allies took the island of Sicily from the Axis powers. It began with a large amphibious and airborne operation, followed by a six-week land campaign, and initiated the Italian Campaign. -
D-day
The Normandy landings were the landing operations on Tuesday, 6 June 1944 of the Allied invasion of Normandy in Operation Overlord during World War II.Codenamed Operation Neptune and often referred to as D-Day, it was the largest seaborne invasion in history. -
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The Battle of Leyte Gulf.
The Battle of Leyte Gulf is generally considered to have been the largest naval battle of World War II and, by some criteria, possibly the largest naval battle in history. -
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Battle of the Bulge
The Battle of the Bulge, also known as the Ardennes Counteroffensive, took place from 16 December 1944 to 25 January 1945, and was the last major German offensive campaign on the Western Front during World War II. -
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Battle of Okinawa
The Battle of Okinawa, codenamed Operation Iceberg, was a major battle of the Pacific War fought on the island of Okinawa by United States Marine and Army forces against the Imperial Japanese Army. -
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Battle of Berlin
The Battle of Berlin, designated the Berlin Strategic Offensive Operation by the Soviet Union, and also known as the Fall of Berlin, was the final major offensive of the European theatre of World War II. -
Dropping of the Atomic bombs on Hiroshima. “Little Boy”
On August 6, 1945, during World War II (1939-45), an American B-29 bomber dropped the world’s first deployed atomic bomb over the Japanese city of Hiroshima. -
Dropping of the Atomic bombs on Nagasaki. "Fat Man"
Three days later, a second B-29 dropped another A-bomb on Nagasaki, killing an estimated 40,000 people. Japan’s Emperor Hirohito announced his country’s unconditional surrender in World War II in a radio address on August 15, citing the devastating power of “a new and most cruel bomb.”