Although the victorious Allies of World War I had prohibited the union of Austria and Germany, their reaction to the Anschluss was mild. Even the strongest voices against annexation, particularly those of Fascist Italy, France and Britain (the "Stresa Front") were not backed by force. In the House of Commons Chamberlain said that "The hard fact is that nothing could have arrested what has actually happened Austria unless this country and other countries had been prepared to use force." The American reaction was similar. The international reaction to the events of 12 March 1938 led Hitler to conclude that he could use even more aggressive tactics in his plan to expand the Third Reich. The Anschluss paved the way for Munich in September 1938 because it indicated the likely non-response of Britain and France to future German aggression.