A service medal is a type of award given to members of the military or certain organizations as a recognition for their dedicated and valuable service. Full definition
It takes the prize back to the bad old days when it was nothing more than a distinguished service medal and when everyone who had been around for long enough would eventually win it. (waldemar.tv)
He didn't receive his military service medals until yesterday. (news.wbfo.org)
He has also been awarded the Defense Meritorious Service Medal, Naval Commendation Medal, and Naval Achievement Medal (with Gold Star in lieu of Second Award). (blog.politics.ox.ac.uk)