Fears were confirmed when on 30 July a German medical corps colonel presented himself with an order for the requisition of two public buildings for the establishment of a military hospital. On the following day, 31 July 1944, in view of the likely invasion by German forces, the state sent three letters of protest: one to Joachim von Ribbentrop, German Foreign Minister, one to Adolf Hitler and one to Benito Mussolini, the latter delivered by a delegation to Serafino Mazzolini, a high-ranking diplomat in the Italian Ministry of Foreign Affairs. Demanding to meet Mussolini with the intention to ask that its neutrality be respected, the following day Mazzolini took them to see Mussolini, who promised to contact the German authorities and intervene in favour of San Marino's request.