M-75 saw very limited service in the US but was exported to Sth Vietnam , etc. Greece was a big user & modifier of this beast as was some US Police forces ....
The M75 is a American armored personnel carrier that was produced between December 1952 and February 1954, and saw service in the Korean War. It was replaced in U.S. service by the smaller, cheaper, amphibious M59. The M75s were given as military aid to Belgium where they were used until the early 1980s. 1,729 M75s were built before production was halted.
Didn't Belgium buy most of the US Army ones?