On 23 March 1939, in another meeting with Lord Halifax, Bonnet mentioned that he had received a series of messages from François-Poncet, claiming that it would create a highly negative impression on Mussolini and would hamper efforts to detach him from his alignment with Germany if Britain and France aligned themselves with only the Soviet Union. Bonnet's statement was to lead the British government into considering the idea of making a "guarantee" of Polish independence as the best way of securing Polish support for Romania. In this way, Bonnet played a major, if indirect role in the progress leading to the British "guarantee" of Poland on 31 March 1939. Following the British "guarantee" of Polish independence on 31 March 1939, followed by the announcements that London wished to build a "peace front" to resist aggression in April 1939, Bonnet felt there was now a great opportunity of building an Anglo-French-Soviet combination that might deter Germany from war. On 14 April 1939, Bonnet had a meeting with the Soviet Ambassador to France, Jakob Suritz, and asked "in a form to be determined" for the Soviet Union to provide military support for Poland and Romania if those nations were attacked by Germany.