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

Pre 1954 Issue (BRITT:OMM)

Republic of Yemen

The Mercantile Marine War Medal

this award was discontinued in 1993 following the review of the honours system and replaced with the Distinguished Service Cross

Cadet Forces Miniature Medal EIIR Campaign_Afghanistan it was extended to officersThe qualifying period for the medal is 12 years, with clasps awarded for further 8 years and from 1st April 1999, 6 years service. Up to 3 additional awards are decorated with bars, 4+ awards were decorated by a gilt rosette.