Germany became responsible for WW1, they had to pay reparations to France and Great-Britain for the damage they caused. Germany had to reduce they're army and they had to dismantle they're marine forces and they're aviation. They could no longer make alliances. They had to sign article 231 which recognized them as responsible to take the blame for the war. They had to recognize the independence of Austria-Hungary and they lost many territories they had power over before. Poland was created.