Distinguished Service Medal (United Kingdom)
British military decoration awarded to personnel of the Royal Navy

The Distinguished Service Medal (DSM) was a military decoration awarded until 1993 to personnel of the Royal Navy and members of the other services, and formerly to personnel of other Commonwealth countries, up to and including the rank of Chief Petty Officer (OR-7), for bravery and resourcefulness on active service at sea.
History
The medal was established on 14 October 1914 as the third level decoration for gallantry in action for ratings of the Royal Navy, not at the standard required to receive the Victoria Cross or the Conspicuous Gallantry Medal. The equivalent decoration for Officers and Warrant Officers was the Distinguished Service Cross (DSC). The DSM ranked below the DSC in order of precedence, between the George Medal and the Military Medal after those medals were established in 1940 and 1916 respectively. Awards of the DSM were announced in the London Gazette. Recipients are entitled to use the post-nominal letters "DSM".
The DSM was intended to reward bravery at sea. For example, members of the Royal Naval Division, who served alongside the Army in France in the First World War, were eligible for Army decorations, including the Distinguished Conduct Medal and the Military Medal.
From 1916, ribbon bars could be authorised for subsequent awards of the DSM.
In 1940 the award was extended to Royal Air Force personnel serving with the Fleet and, in 1942, to members of the Merchant Navy, and Army personnel serving afloat, for example manning a merchant ship's anti-aircraft guns. A number of awards were also made to civilians, including two for ferrying troops from the beaches during the 1940 Dunkirk evacuation.
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This entry incorporates text from “Distinguished Service Medal (United Kingdom)” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.