The Sudetenland Crisis came to an end when Neville Chamberlain and Hitler signed the Munich Agreement on 29 September 1938, effectively ceding the Sudetenland to Nazi Germany.[39] Involvement in international affairs by the SD certainly did not end there and the agency remained active in foreign operations to such a degree that the head of the Reich Foreign Ministry office, Joachim von Ribbentrop, complained of their meddling, since Hitler would apparently make decisions based on SD reports without consulting him.[40] According to historian Richard Breitman, there was animosity between the SS leadership and Ribbentrop's Foreign Office atop their "jurisdictional disputes".[41][lower-alpha 2]