The United Kingdom By srasmusson Feb 21, 1939 UK declares war on Germany. Feb 21, 1940 Winston Churchill becomes prime minister. London and other cities badly damaged in German bombing raids. Jun 6, 1944 Allied troops invade France from Britain on D-Day and began to fight their way towards Germany. May 8, 1945 Germany surrenders. Feb 22, 1949 The UK becomes a founder member of Nato. Feb 25, 1953 Coronation of Queen Elizabeth 2. Feb 25, 1969 British troops sent to quell unrest in Northern Ireland.