Cause of WW1

World war 1 mainly started because of competition prejudice and hatred . Another reason would be nationalism because people didn't want to be controlled by others they wanted to have their own country own language and ritual eventually this happened because their were many new countries that formed after the war ended. For example Austria-Hungary turned into separate countries, Austria and Hungary . Militarism was a reason because European nations were building up their army and training them just because their close countries were doing it too. But they had nothing to do with the Arny for now. But the main reason the war started was because of the assassination of Franz Ferdinand. But before that they were just looking for a way to start a war and after the assassination the the war started. The assassin was a Serbian guy so Austria- Hungary were Franz was from, declared war on Serbia the Russian started defending Serbia then Germany declared war on Russia and slowly every European nation jumped into the war . Another important reason was imperialism each European Nation needed goods to run factories so European nations would go overseas and get raw materials . And like that every European nation competed for raw materials.