1. Alliiances probably had the biggest impact for the start of World War 1. Without alliances other countries probably wouldn't have gotten involved. 2. Militarism was most likely the second cause of the war. Because of Militarism many countries grew their armies which led to tension between countries about having strenght and power due to their army sizes. 3. Imperialism was most likely the third cause of the war because Germany and Italy wanted to have a colonial empire which led to conflict and disputes about land ownership because having more land equals having more power and wealth. 4. The last cause of the war was probably Nationalism because it only created pride in their country about which was the best, it was the reason that