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The history of the United States from 1917 to 1945 was marked by World War I, the interwar period, the Great Depression, and World War II. The United States tried and failed to broker a peace settlement for World War I , then entered the war after Germany launched a submarine campaign against U.S. merchant ships that were supplying Germany's ...
In the history of the 20th century, the interwar period (or interbellum) lasted from 11 November 1918 to 1 September 1939 (20 years, 9 months, 21 days) – from the end of World War I (WWI) to the beginning of World War II (WWII). It was relatively short, yet featured many social, political, military, and economic changes throughout the world.
June 21–22, 1942 – Bombardment of Fort Stevens, the second attack on a U.S. military base in the continental U.S. in World War II. September 9, 1942, and September 29, 1942 – Lookout Air Raids, the only attack by enemy aircraft on the contiguous U.S. and the second enemy aircraft attack on the U.S. continent in World War II.
List of World War II military vehicles of Germany; List of World War II ship classes; List of World War II ships; List of World War II ships of less than 1000 tons; List of WW2 Luftwaffe aircraft by manufacturer; List of aircraft of Italy, World War II; List of aircraft of Japan, World War II; List of ships of the Imperial Japanese Navy
The world powers in 1939, before the start of World War II. January 25 A uranium atom is split for the first time at Columbia University in the United States. [49] January 27 Hitler orders Plan Z, a 5-year naval expansion programme intended to provide for a huge German fleet capable of defeating the British Royal Navy by 1944.
World War II [b] or the Second World War (1 September 1939 – 2 September 1945) was a global conflict between two coalitions: the Allies and the Axis powers. Nearly all the world's countries—including all the great powers—participated, with many investing all available economic, industrial, and scientific capabilities in pursuit of total war, blurring the distinction between military and ...
The causes of World War II have been given considerable attention by historians. The immediate precipitating event was the invasion of Poland by Nazi Germany on September 1, 1939, and the subsequent declarations of war on Germany made by Britain and France, but many other prior events have been suggested as ultimate causes.
Timeline of the United Kingdom home front during World War II (1939–1945) Timeline of the Molotov–Ribbentrop Pact (1918–1941) Timeline of Sweden during World War II (1939–1945) Timeline of the Netherlands during World War II (1939–1945) Chronology of the liberation of Dutch cities and towns during World War II