But Studebaker also built a 6x6 truck around the same time. Called the US6, the 2.5-ton hauler was manufactured by Studebaker and REO, the latter a company founded by Ransom E. Olds.

While built by different companies, the CCKW and the Studebaker US6 have quite a few things in common. They look about the same, they both rely on inline-six engines, and they're pretty much ...