M35 series 2½-ton 6×6 cargo truck
The M35 2½-ton cargo truck is a long-lived 2½-ton 6×6 cargo truck initially used by the United States Army and subsequently utilized by many nations around the world. Over time it evolved into a family of specialized vehicles.
Source: Wikipedia — M35 series 2½-ton 6×6 cargo truck (CC BY-SA 4.0)