Causes of WWI

World War 1 started on 1914. One of the reasons/causes of WWI was all the countries militaries. Every Country begun to build up there armies. Every year starting from 1880 Europe would spend more and more money on their military. So it was like a competition to see who would build the bigger army. With all of these countries on each others borders with an army , war was bound to happen. Another cause is Imperialism. France took over most of Africa . The British had control over some countries in 5 continents. When Germany decided to gain control on other countries as well, that created more rivalry towards Germany. Now the big and main reason World war 1 had begun was when Franz Ferdinand was assassinated . Franz Ferdinand was the heir to the austro-Hungrian Throne. But on June 28 , 1914 Franz Ferdinand was assassinated by Gavrilo princip. Gavrilo Princip was a Serbian nationalist , sent along with 3 other men to assassinate Franz Ferdinand . Now When This assassination occurred Austro-Hungary was furious. So they declared war on Serbia. Now Most of the European countries had alliances with other countries. So when Austro-Hungary declared war on Serbia, Serbia had an alliance with another country and that country with another and so on.The same with Austro-Hungary.