The 1939–1945 Star is a military campaign medal instituted by the United Kingdom on 8 July 1943 for award to British and Commonwealth forces for service in the Second World War. Two clasps were instituted to be worn on the medal ribbon, Battle of Britain and Bomber Command.
On 8 July 1943, the 1939–43 Star (later named the 1939–1945 Star) and the Africa Star became the first two campaign stars instituted, and by May 1945 a total of eight stars and nine clasps had been established by the United Kingdom to reward campaign service during the Second World War. One more campaign star, the Arctic Star, and one more clasp, the Bomber Command Clasp, were belatedly added on 26 February 2013, more than sixty-seven years after the end of the war.