It was known as, "The Spark", which was the assassination of Austria-Hungary Archduke Franz Ferdinand. Also, Militarism and Imperialism caused WW1, and also the sinking of almost one hundred ships outside Europe by German U-Boats(Submarines). For example, the sinking of the Lusitania, which over 100 Americans were killed, caused the US to get involved in the war.
The U.S. tried to remain out of the conflict.
In world war 1,germany started the war,but in world war 2,japan started it and usa ended the war
World War II The War Chronicles - 1983 The Greatest Conflict 1-1 was released on: USA: 1983
No world war 1 was started in 1914 . World war two started in 1939
world war 1 started July 28th 1914 and world war 2 started 3rd September 1939
War is when there is an armed conflict between 2 or more nations. World War 1 was exactly that- an armed conflict that involved a large part of all the countries in the world.
When Serbia gained independence, it started on a quest to create a Slavic empire, which brought them into conflict with the powerful Austro-Hungarian Empire. And that was the conflict that caused the assassination of Archduke Franz Ferdinand, which in turn caused World War I.
Because the whole world was basically in the war
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killing
World War 1 , two Korean Wars, and the Vietnam conflict are examples of undeclared wars. The US went to war without a Declaration of War from Congress.
World War 1 started in 1914 and ended in 1918, World War 2 started in 1939 and ended in 1945