Air Crew Europe Clasp could not be added to the later period France and Germany Star. Institution The Battle of the Atlantic took place between 3 September 1939 and 8 May 1945, as German U-boats attacked convoys transporting vital supplies from America and the Colonies to Britain. Warships of the Royal Navy and aircraft of the Royal Air Force escorted these convoys, hunted the U-boats and, despite some notable successes by the U-boats, eventually won a comprehensive victory in the Atlantic. The Atlantic Star was instituted in May 1945 to honour those who took part in the Battle of the Atlantic and was intended primarily for award to those who served in shipping convoys and their escorts and anti-submarine forces, as well as to those who served on fast merchant ships which sailed alone. Two clasps were instituted to be worn on the Atlantic Star's ribbon, 'Air Crew Europe' and 'France and Germany'. British uniform regulations stipulated that no one person could be awarded more than one clasp to any one campaign star, and as neither the Air Crew Europe Star nor the France and Germany Star could be awarded to a recipient of the Atlantic Star, any subsequent entitlement to either of these two stars was denoted by the appropriate clasp to the Atlantic Star, with only the first clasp earned being worn. Award criteria Broad criteria The qualifying areas for the award of the Atlantic Star were the Atlantic and Home Waters excluding the Mediterranean, the south Atlantic between the longitude of Cape Horn and longitude 20° East (South Africa), and the convoy routes to ports in North Russia. The Atlantic Star was awarded for six months service afloat in the Atlantic or in Home Waters within the period from 3 September 1939 to 8 May 1945. It was also awarded to air crew who had taken part in operations against the enemy at sea within the qualifying areas, subject to having served for two months in an operational unit. The 1939–1945 Star must have already been earned by six months service, or two months for air crew, before commencing qualifying service for the Atlantic Star. Merchant seaman also qualified for the award of the medal, also on condition that the 1939–1945 Star must have already been earned. They were required to have served in the Atlantic, Home Waters, North Russia Convoys or the south Atlantic. Special criteria