Starting with the May Crisis, Bonnet began a campaign of lobbying the United States to become involved in European affairs, asking that Washington inform Prague that in the event of a German-Czechoslovak war the "Czech government would not have the sympathy of the American government if it should not attempt seriously to produce a peaceful solution... by making concessions to the Sudeten Germans which would satisfy Hitler and Henlein". In a meeting with the American Ambassador William Christian Bullitt, Jr. on 16 May 1938, Bonnet stated his belief that another war with Germany would be more dreadful then any previous war and that Bonnet "would fight to the limit against the involvement of France in the war". As part of his effort to gain Bullitt's trust, Bonnet showed the American notes received from the British government during the May crisis. In a radio broadcast sent directly to the United States on 4 July 1938, Bonnet proclaimed his belief in the "common ideals" that linked France and the United States as a way of pressuring for greater American interest in the crisis in Central Europe.