the Arado Ar 232 Tausendfüßler (Millipede), one of the first truely modern transport aircraft. It could lower it's main landing gear, and sit on those small wheels to taxi and handle cargo. When on those wheels, the cargo deck was level and at truck bed height, for ease of cargo handling. This aircraft also was one of the first to have a loading ramp on the rear, like those on modern transports.
Found on https://www.facebook.com/iloveww2planes?fref=nf