Diplomatic history of World War II in the Dunkirk evacuation in late May/early June 1940. Tens of thousands of tanks, trucks and artillery guns were left behind, as well as all of the radios, machine guns, rifles, tents, spare parts and other gear. The new Prime Minister Winston Churchill pledged that Britain would continue to fight for France's freedom, even if it must do so alone. After Mers el Kebir, Britain recognised Free France as its ally and the legitimate government of France. The United States maintained diplomatic relations with Vichy (until late 1942) and avoided recognition of de Gaulle's claim to be the one and
Leader of the Opposition (United Kingdom) Commons, was for the chairman to function as acting leader in the House. Maclean therefore took on the role of Leader of the Opposition, followed by Asquith, who returned to the House by winning a by-election (1920–22). From 1922 the Labour Party had a recognised leader so took over all remaining commons opposition roles from the Opposition Liberal Party. Since 1922 the principal Government and Opposition parties have been the Labour Party and the Conservative Party. There were three instances of peers being seriously considered for the prime ministership, during the twentieth century (Curzon of Kedleston in 1923, Halifax in