Appeasement was a policy of giving in to aggressive demands of dictators like Hitler to avoid war. It was championed by Prime Minister Chamberlain but opposed by Churchill who argued it would fail to stop further aggression. Arguments for appeasement included that Britain was not prepared for war and wanted to buy time to rearm, while arguments against included that it emboldened dictators and abandoned allies like Czechoslovakia. Appeasement failed to stop German rearmament and Hitler's annexation of territories like Austria, the Sudetenland and eventually invasion of Poland.