Causes of World War I
World War One occurred from 1914 to 1918. It came around due to many causes. Most likely, the obvious cause for the war was the assassination of the heir to the Austro-Hungarian throne, the Archduke Franz Ferdinand on June 28, 1914. ... Nationalism was also a very large cause of the First World War. ... This created more conflict in leading to World War One. Another well-known “ism” that became a cause for the war was imperialism. It was in Europe for before the war. Each of the most powerful countries in Europe wanted to expand their nation into new areas in the world to take advantage of the opportunities that the new land had.