World War I started in the summer of 1914. Most of the war took place in Europe. The war was long and lasted four years. World War I was unlike any previous wars. New weapons such as machine guns, tanks and poison gas made fighting deadlier than ever. Also, the civilian population was no longer safe from attack by military forces. Submarines changed naval warfare because they could sink ships without warning. Since, fighting was set all across the world they called it the World War. The main cause for the war was the assassination of Archduke Francis Ferdinand and his wife, who was heir to the throne of Austria- Hungary. The person who assassin Archduke was a Serbian nationalist on the morning of June 28, 1914, while he was traveling through Sarajevo. Sarajevo was the capital city of Bosnia and Herzegovina. The main reason why Archduke was assassin was because the Serbians feared that after his rise to the throne he would continue the persecution of Serbs living within the Austro – Hungarian Empire. The Serbian terrorist organization, the Black Hand, had trained a small group of teenage operatives to break into Bosnia and carry out assassination of the Archduke. It was also believed that Nationalism, Militarism, and Imperialism were huge war factors for this war.
             To begin with, Nationalism was becoming a powerful force in Europe so people that had the same culture, language wanted their own country. Consequently, this was a problem to the Austria- Hungary government because they did not want to lose their power and control. In this case, the Slavs in the southern part of the empire were their main concern since they wanted to join up to Serbia. In addition to this, this tension helped people unite with each other, it also this got countries against one another. Nationalism created deep mistrust and even hatred between nations.
             Militarism is another factor, to understand what Militarism means we should reme...