it was extended to officers of the RAF for acts of gallantry on the ground and during World War One there was provision made for officers of the Royal Naval Division and Royal Marines

recipients must first have earned the 1939–1945 Star

Speech to the House of Commons may 13th 1940 - "

com/distinguished-service-order-eiir-p-17757

Medal Edge Engraving - or Medal 'Naming'

Distinguished Service Medal GVI Category_Miniature Bars it was extended to officersThe DSM was expanded during World War Two to include the Merchant Navy and Army, the WRNS and RAF personnel serving aboard ships. Second award bars issued during the war do not carry the date of award on the reverse unlike those of World War One. As in the First World War the majority of awards issued to foreign nationals were issued un named.