M35s in South Korea.

 South Korean Army M35 2.5 Ton 6x6 trucks.

These U.S. military trucks were part of a series of 6x6 trucks that dated back into the 1920s.  The 6x6 was developed, for U.S. military use, by the Artillery branch of the U.S. Army which could not find a suitable civilian product for use as an artillery tractor. Developed over the years, the series came into use in a major way at the onset of the Second World War, by which point civilian contractors could and did supply an entire series of 6x6 trucks, all of which closely resemble each other, but which in fact varied by manufacture.

After World War Two the service wished to standardize the trucks and update them, resuling in the M35, which entered service in 1950, just at the start of the Korean War.  Produced all the way into the 1990s, the series remains in widespread use around the globe, although it has been replaced by other trucks in U.S. military use.

The 6x6 series of trucks were great vehicles, and in very real terms, the World War Two vintage trucks can legitimately contend for the most important piece of military equipment of the Second World War.

 South Korean troops in 6x6 truck.