Question: What is MARS 27

[SrgtsGrandkid]

My grandfather enlisted in the USMC in 1955. He was then selected for the State Department. However, my question is about an outfit he was in called MARS 27. I was wondering if someone could give a little history about what it was. Thanks for help if anyone can.

:flag:Semper Fi

[yellowwing]

Military Affiliate Radio System (http://www.google.com/search?hl=en&safe=off&rls=DVXA%2CDVXA%3A2006-42%2CDVXA%3Aen&q=military+affiliate+radio+system)