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World War 2 Timeline

  • Japanese invasion of China

    Japanese invasion of China
    In 1937 skirmishing between Japanese and Chinese troops on the frontier led to what became known as the Marco Polo Bridge Incident. This fighting sparked a full-blown conflict, the Second Sino-Japanese War. Because of historic ties, China also received aid from Nazi Germany for a short period, until Hitler decided to make an alliance with Japan in 1938.
  • The Rape of Nanking

    The Rape of Nanking
    n December of 1937, the Japanese Imperial Army marched into China's capital city of Nanking and proceeded to murder 300,000 out of 600,000 civilians and soldiers in the city. The six weeks of carnage would become known as the Rape of Nanking and represented the single worst atrocity during the World War II era in either the European or Pacific theaters of war.
  • German Invasion of Poland

    German Invasion of Poland
    On September 1, 1939, Germany invaded Poland. The Polish army was defeated within weeks of the invasion. From East Prussia and Germany in the north and Silesia and Slovakia in the south, German units, with more than 2,000 tanks and over 1,000 planes, broke through Polish defenses along the border and advanced on Warsaw in a massive encirclement attack. After heavy shelling and bombing, Warsaw surrendered to the Germans on September 27, 1939.
  • German Blitzkrieg

    German Blitzkrieg
    A German term for “lightning war,” blitzkrieg is a military tactic designed to create disorganization among enemy forces through the use of mobile forces and locally concentrated firepower. Its successful execution results in short military campaigns, which preserves human lives and limits the expenditure of artillery. German forces tried out the blitzkrieg in Poland in 1939 before successfully employing the tactic with invasions of Belgium, the Netherlands and France in 1940.
  • Pearl Harbor

    Pearl Harbor
    ust before 8 a.m. on December 7, 1941, hundreds of Japanese fighter planes attacked the American naval base at Pearl Harbor near Honolulu, Hawaii. The barrage lasted just two hours, but it was devastating: The Japanese managed to destroy nearly 20 American naval vessels, including eight enormous battleships, and more than 300 airplanes. More than 2,000 Americans soldiers and sailors died in the attack, and another 1,000 were wounded.
  • Bataan Death March

    Bataan Death March
    After the April 9, 1942, U.S. surrender of the Bataan Peninsula on the main Philippine island of Luzon to the Japanese during World War II (1939-45), the approximately 75,000 Filipino and American troops on Bataan were forced to make an arduous 65-mile march to prison camps. The marchers made the trek in intense heat and were subjected to harsh treatment by Japanese guards. Thousands perished in what became known as the Bataan Death March.
  • Warsaw Ghetto uprising

    Warsaw Ghetto uprising
    Although initially there was tension between the ZOB and the ZZW, both groups decided to work together to oppose German attempts to destroy the ghetto. At the time of the uprising, the ZOB had about 500 fighters and the ZZW had about 250. While efforts to establish contact with the Polish military underground movement did not succeed during the summer of 1942, the ZOB established contact with the Home Army in October, and obtained a small number of weapons, mostly pistols and explosives.
  • D-Day

    D-Day
    Codenamed Operation Overlord, the battle began on June 6, 1944, also known as D-Day, when some 156,000 American, British and Canadian forces landed on five beaches along a 50-mile stretch of the heavily fortified coast of France’s Normandy region. The invasion was one of the largest amphibious military assaults in history.
  • Battle of the Bulge

    Battle of the Bulge
    in December 1944, Adolph Hitler attempted to split the Allied armies in northwest Europe by means of a surprise blitzkrieg thrust through the Ardennes to Antwerp. As the Germans drove deeper into the Ardennes in an attempt to secure vital bridgeheads, the Allied line took on the appearance of a large bulge, giving rise to the battle’s name. Lieutenant General George S. Patton’s successful maneuvering of the Third Army to Bastogne proved vital to the Allied defense.
  • Liberation of concentration camps

    Liberation of concentration camps
    As Allied troops moved across Europe in a series of offensives against Nazi Germany, they began to encounter tens of thousands of concentration camp prisoners. Many of these prisoners had survived forced marches into the interior of Germany from camps in occupied Poland. These prisoners were suffering from starvation and disease.
  • Battle of Iwo Jima

    Battle of Iwo Jima
    Following elaborate preparatory air and naval bombardment, three U.S. marine divisions landed on the island in February 1945. Iwo Jima was defended by roughly 23,000 Japanese army and navy troops, who fought from an elaborate network of caves, dugouts, tunnels and underground installations. Despite the difficulty of the conditions, the marines wiped out the defending forces after a month of fighting,
  • Battle of Okinowa

    Battle of Okinowa
    Last and biggest of the Pacific island battles of World War II, the Okinawa campaign (April 1—June 22, 1945) involved the 287,000 troops of the U.S. Tenth Army against 130,000 soldiers of the Japanese Thirty-second Army. At stake were air bases vital to the projected invasion of Japan. By the end of the 82-day campaign, Japan had lost more than 77,000 soldiers and the Allies had suffered more than 65,000 casualties—including 14,000 dead.
  • VE Day

    VE Day
    On this day in 1945, both Great Britain and the United States celebrate Victory in Europe Day. Cities in both nations, as well as formerly occupied cities in Western Europe, put out flags and banners, rejoicing in the defeat of the Nazi war machine.
  • Dropping of the atomic bombs

    Dropping of the atomic bombs
    The plane dropped the bomb–known as “Little Boy”–by parachute at 8:15 in the morning, and it exploded 2,000 feet above Hiroshima in a blast equal to 12-15,000 tons of TNT, destroying five square miles of the city.“Fat Man” was dropped at 11:02 that morning. More powerful than the one used at Hiroshima, the bomb weighed nearly 10,000 pounds and was built to produce a 22-kiloton blast. The topography of Nagasaki, which was nestled in narrow valleys between mountains, reduced the bomb’s effect.
  • VJ Day

    VJ Day
    On August 14, 1945, it was announced that Japan had surrendered unconditionally to the Allies, effectively ending World War II. Since then, both August 14 and August 15 have been known as “Victoryover Japan Day,” or simply “V-J Day.” The term has also been used for September 2, 1945, when Japan’s formal surrender took place aboard the U.S.S. Missouri, anchored in Tokyo Bay. Coming several months after the surrender of Nazi Germany, Japan’s capitulation in the Pacific brought six years of hostili