Alliances and militarism are both very important causes of World War I, as well as lastly imperialism. On Document F it shows the population of the empires. The population of the empires determine how strong the countries can be and it gives them the opportunity to take over other countries. This factors into the war because countries clearly do not want to be taken over, so it causes more issues and leads to more fighting. If imperialism was not an issue in this war then this war may not have became as big as it did, because countries would not have been worried about being taken over, so they would not have fought as