Why was Germany made responsible for World War 1?

Austrian Crown Prince Franz Ferdinand and his wife were assassinated in the back streets of Sarajevo by a Muslim extremist. Austria ruled over the Balkans at this time as part to the Hapsburg empire. Austria was content to let the diplomats sort the mess out, but the German kaiser willhelm demanded justice and forced Austria to issue an ultimatum that the british could not ignore..

The war was an excuse by kaiser willhelm to try and gain new colonies at the expense of the british as he was red with jealousy over the power and authority exerted by the british, as at this time in history, no country in the world did anything without the permission of the british as the empire was so strong