The British allowed Germany to have a slightly larger navy than dictated by the Treaty of Versailles in hopes of reducing German anger over the treaty and increasing stability in Europe. However, this was seen by some as encouraging Germany to violate the treaty. Britain later pursued a policy of appeasement toward Germany by not opposing its remilitarization of the Rhineland, involvement in the Spanish Civil War, or annexation of Austria. This emboldened Hitler and made Britain appear weak, leading Hitler to demand control of Czechoslovakia's Sudetenland. When his demands were met peacefully, Hitler gained confidence to continue aggression, eventually invading Poland and starting World War II.