Churchill had not been the preferred choice of most Conservatives to succeed Chamberlain, but the motion on 13 May "That this House welcomes the formation of a Government representing the united and inflexible resolve of the nation to prosecute the war with Germany to a victorious conclusion" passed unanimously. He had been unpopular in many circles since the 1930s and MPs had ignored or heckled his speeches denouncing the prime minister's appeasement policy toward Germany; even others who opposed Chamberlain avoided him. One historian has described the speech's effect on Parliament, however, as "electrifying ... He was still speaking at the House of Commons, but it was now listening, and cheering." (However, Churchill himself subsequently held that many Conservative MPs had still regarded him with reserve and it was not until his speech of 4 July 1940 announcing British action against the French fleet at Mers-el-Kebir that he could feel he had the full support of the whole House.) Other great speeches followed, including the "We shall fight on the beaches" speech of 4 June and the "This was their finest hour" speech of 18 June, and were a great inspiration and unifying force to Britain after its defeats in the first year of the war.