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1. The assassination of Archduke Franz Ferdinand in Sarajevo on 28th June 1914, it triggered a chain of events that resulted in World War 1. After the assassination, Austria-Hungary threatened war on Serbia.
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3. World War II the chief Allied powers were Great Britain, France (except during the German occupation, 1940–44), the Soviet Union (after its entry in June 1941), the United States (after its entry on December 8, 1941), and China. More generally, the Allies included all the wartime members of the United…
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5. Trench warfare
Trenches were common throughout the Western Front.
Trench warfare in World War I was employed primarily on the Western Front, an area of northern France and Belgium that saw combat between German troops and Allied forces from France, Great Britain and, later, the United States.
6. 40 million
The total number of military and civilian casualties in World War I is estimated to be about 40 million: estimates range from 20.5 to 22 million deaths and about 20 to 22 million wounded military personnel, ranking it among the deadliest conflicts in human history.
7. The Treaty of Paris, formally ending the war, was not signed until September 3, 1783. The Continental Congress, which was temporarily situated in Annapolis, Maryland, at the time, ratified the Treaty of Paris on January 14, 1784.
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