What are the main causes of World War 1? To define World War 1 or “ The Great Wars” ,It all started in 1914 when they assassinated Archduke of austria-hungary.When they assassinated Archduke it changed their country after that occasion they went to war for four years. When they to were there was he different causes such as militarism,alliances,imperialism those ideas caused all the wreckage in those countries. During World War 1 there were some causes that interrupted and one of them are militarism . During the great wars there was some major money involved from 1890 to 1914 Germany and Austria Hungary spend over 85 million british pounds.Once you spend all that money also lose eco and there people. During those years germany spent most