Short History of WWII

World War II (1939–1945) was the largest and deadliest conflict in human history, pitting the Axis powers (primarily Germany, Japan, and Italy) against the Allied powers (primarily the United States, Great Britain, the Soviet Union, and China).

Causes and Outbreak (1919–1939)

• Root Causes: Economic ruin from the Great Depression and severe resentment in Germany over the harsh terms of the Treaty of Versailles enabled Adolf Hitler and the Nazi Party to seize power in 1933.
• Appeasement & Expansion: Hitler rebuilt the German military, reoccupied the Rhineland, annexed Austria, and seized parts of Czechoslovakia. Britain and France practiced appeasement to avoid another war, failing to stop him.
• Invasion of Poland: On September 1, 1939, Germany invaded Poland. Two days later, Britain and France declared war on Germany, officially starting World War II in Europe.

Axis Ascendancy and Global Spread (1940–1941)

• Fall of France: In 1940, Germany overran Western Europe using blitzkrieg (lightning war) tactics, knocking France out of the fight and leaving Britain isolated during the Battle of Britain.
• Operation Barbarossa: In June 1941, Hitler broke his pact with Joseph Stalin and invaded the Soviet Union, opening a brutal Eastern Front.
• The Pacific War: Japan, seeking an Asian empire and rich natural resources, had already invaded China. On December 7, 1941, Japan launched a surprise attack on the U.S. naval base at Pearl Harbor, drawing the United States into the global conflict.

Turning Points (1942–1943)

• Battle of Midway (1942): The U.S. Navy inflicted a critical defeat on the Japanese fleet in the Pacific, halting Japanese expansion.
• Battle of Stalingrad (1943): Soviet forces defeated the German army in a grueling winter siege, marking the permanent turning point on the Eastern Front.
• North Africa and Italy: Allied forces drove Axis troops out of North Africa and invaded Italy, forcing Mussolini's government to collapse.

Allied Offensive and Victory (1944–1945)

• D-Day (June 6, 1944): Allied forces under General Dwight D. Eisenhower landed on the beaches of Normandy, France, opening a western front to push toward Germany.
• Fall of Germany: As Soviet troops closed in from the east and Western Allies pressed from the west, Berlin fell. Hitler died by suicide, and Germany surrendered unconditionally in May 1945.
• End in the Pacific: Following intense island-hopping campaigns and firebombing, the U.S. dropped atomic bombs on Hiroshima and Nagasaki in August 1945. Japan formally surrendered on September 2, 1945.

Cost and Legacy

• Human Toll: The war resulted in an estimated 60 to 75 million fatalities, the majority of whom were civilians. This included the Holocaust, in which Nazi Germany systematically murdered 6 million Jews and millions of others.
• New World Order: The war destroyed the old European colonial balance, led to the creation of the United Nations, and birthed the Cold War rivalry between the United States and the Soviet Union.