German foreign minister Joachim von Ribbentrop approved the NDH acquisition of the Dalmatian territories gained by Italy at the time of the Rome contracts. By now, most such territory was actually controlled by the Yugoslav Partisans, since the ceding of those areas had made them strongly anti-NDH (more than one third of the total population of Split is documented to have joined the Partisans). By 11 September 1943, NDH foreign minister Mladen Lorković received word from German consul Siegfried Kasche that the NDH should wait before moving on Istria. Germany's central government had already annexed Istria and Fiume (Rijeka) into the Operational Zone Adriatic Coast a day earlier.