Germany began aggressively expanding its military in violation of the Treaty of Versailles. Hitler sought to gain "living space" or Lebensraum by taking land from countries he viewed as inferior. Germany aided Franco's nationalists in the Spanish Civil War to test its new military tactics. Germany later formed the Axis alliance with Italy and Japan to oppose communism. Despite condemning Germany's rearmament, the League of Nations took no action to stop it. Germany continued expanding by remilitarizing the Rhineland, annexing Austria, and taking the Sudetenland from Czechoslovakia with the appeasement policy of Britain and France proving ineffective at halting German aggression.