World War II or the Second World War (often abbreviated WWII) was a global military conflict which involved a majority of the world's nations, including all of the great power's, organized into two opposing military alliances: the Allies and the Axis. The war involved the mobilization of over 100 million military personnel, making it the most widespread war in history. In a state of "total war", the major participants placed their complete economic, industrial, and scientific capabilities at the service of of the war effort, erasing the distinction between civilian and military resources. Over 70 million people, the majority of them civilians, were killed, making it the deadliest conflict in human history. The total financial cost of the war is estimated at about US$1 trillion, making it the most expensive war as well. 
The starting date of the war is generally held to be September 1939 with the German invasion of Poland and subsequent declarations of war on Germany by the United Kingdom, France and the British Dominions; some sources use other starting points, including the Mukden Incident, the Marco Polo Bridge Incident, and the Attack on Pearl Harbor. The Allies were victorious, and, as a result, the Soviet Union and the United States emerged as the world's leading superpowers. This set the stage for the Cold War, which lasted for the next 45 years. The United Nations was formed in the hope of preventing another such conflict. The self determination spawned by the war accelerated decolonization movements in Asia and Africa, while Western Europe itself began moving toward integration.
References[edit | edit source]
- Official military histories in Commonwealth nations refer to the conflict as the Second World War, while the United States' official histories refer to the conflict as World War II. English translations of the official histories of other nations tend to resolve into English as Second World War also, for example Zweiter Weltkrieg in German. See C.P. Stacey Official History of the Canadian Army in the Second World War, for example. "Official" usage of these terms is giving way to popular usage and the two terms are becoming interchangeable even in formal military history.
- Hartmann, Frederick H. The relations of nations, pg. 312
- Dunnigan, James. Dirty Little Secrets of World War II: Military Information No One Told You About the Greatest, Most Terrible War in History, William Morrow & Company, 1994. ISBN 0-688-12235-3
- Mayer, E. (2000) "World War II" course lecture notes on Emayzine.com (Victorville, California: Victor Valley College)
- Coleman, P. (1999) "Cost of the War," World War II Resource Guide (Gardena, California: The American War Library)
- Kantowicz, Edward R. The Rage of Nations, pg. 346
- Greer, Gordon B. What Price Security?, pg. 28
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