you know nothing. in parts of serbia that austria-hungary conquered from serbia, they demanded population to convert to catholicism (we can see now it is actually satanism), or they can't get a job, they can't trade, they can't do anything, they can just die. these territories are today croatia. gavrilo princip, the guy who shoot the duke, was a jew. the federal reserve was created one year earlier, and they needed to create a war so they can give loans to both sides.
Serbia