World War I or as some call it The Great War, originated between European countries, but eventually nations from all over the world got involved. Although the immediate cause to the war was the assassination of Archduke Franz Ferdinand, there were many underlying factors that developed tension over time. This tension was between Europe countries, and it had been building up for decades through Nationalism, Imperialism, Militarism, and even Alliances. One of the underlying causes of the war was Nationalism, which is the love and devotion to one’s own nation. This pride that one developed for their own country resulted in them thinking that their own country was more superior to others. This feeling of Nationalism spread throughout Europe during the 19th century, and it is one of the reasons that started causing tension between these countries. Austria-Hungary in particular had various nationalities which spoke different languages. They started to lose control of their multi-ethnic empire during the Balkan crisis. In 1903, Serbia became increasingly defiant to its former protector (Austria-Hungary). Four years later, The Austrians take advantage of a revolution in Turkey, and they annexed Bosnia in hopes of getting a firmer grip on the Balkans. The annexation instead brought on a European crisis which provoked Serbian nationalists into launching a terror campaign against Austria, causing further destabilization of the area. Imperialism was another cause that contributed towards the First World War. Many European countries wanted to expand outside their borders into neighboring nations, which eventually caused jealousy. Countries like Great Britain had already been taking territories under their control, and doing so increased their wealth, power, and resources. Certain areas from Asia and Africa provided great raw materials and other resources, making them