Causes of World War 1 The cause of World War 1 was the assassination of the heir to the Austrian throne. There was a trigger of events that lead to which would never have happened if the Heir to the Austrian throne were never assassinated. At the time of World War 1 there was 2 main alliances consisting of 3 independent countries. The first alliance was the triple alliance. This alliance consisted of the Austrian-Hungarian Empire, Germany and Italy. The …showed first 75 words of 324 total…

…showed last 75 words of 324 total…to allow Austro-Hungarian investigators to investigate the assassination plot. This list of demands were purposely made so that Serbia would not be able to comply. That was a good enough reason, Austro-Hungary declared war on Serbia. Next Germany declared war on Russia because Russia was allied with Serbia. After 2 days Germany declared war on France and marched right over neutral Belgium. England declared war on Germany because of this so Austro-Hungary declared war on England.