Litvinov's policy of containing Germany via collective security failed utterly with the conclusion of the Munich Agreement on September 29, 1938, when Britain and France favored self-determination of the Sudetenland Germans over Czechoslovakia's territorial integrity, disregarding the Soviet position.[60] However, it is still disputed whether, even before Munich, the Soviet Union would actually have fulfilled its guarantees to Czechoslovakia, in the case of an actual German invasion resisted by France.[61][62]