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The M422 and M422 Mighty-Mites are not technically Jeeps, but since they were built by American Motors from 1960 to 1963 and had one of the original developers of the Jeep as a designer, we’ll include them. The M422 was built for the Marine Corps as an air portable tactical vehicle. Two versions were built, the 67-inch wheelbase M422 and the 71-inch wheelbase M422A1. The units used an aluminum air-cooled V-4 engine, independent suspension with quarter-elliptic leaf springs, and inboard drum brakes. The original concept went back to 1953, when the Mid-America Research Corporation developed the MM100. Harold Crist was the principal engineer and had played a major role in developing the first Jeeps from Bantam in 1940.