Muskrat spent his formative years up to his knees in one swamp or another, hunting raccoon, possum and wild pig. He was able to hold his own against poachers, 'gator skinners, moonshiners, escapes from the chain gangs, and smugglers. Ranger school and JWTC seemed like summer camp to him. As far as he was concerned, they weren't teaching him anything exotic at all!
Muskrat is a G.I. Joe team operative in the A Real American Hero line. First released as a Hasbro carded action figure in 1988, with 3 distinct figure versions produced across the 1982 to 1994 vintage run.
Muskrat did not appear by name in the Sunbow or DiC cartoon series synopses. Original Hasbro file-card lore and Marvel ARAH comics appearances are the primary characterization sources.