Did Germany cause World War 1? Although in the Treaty of Versailles Germany was to accept full responsibility for World War 1 this in not necessarily the case. Many factors have to be taken into account when considering the cause of World War 1. Germany may have been primarily responsible for the war but the other major powers must accept some of the blame for failing to prevent it. The conflict resulting from the assassination of Archduke Franz Ferdinard should have been local and confined but due to a series of factors, militarism, the alli ....