US Military Police, Company A of the 518th Military Police Battalion.
The rider on the left wears a British helmet MK I (Dispatch rider helmet), just added the band and the letters MP in white. The use of these helmets were quite popular with U.S. Army bikers.
Motorcycle is a Harley-Davidson WLA.
The MP on the right carries a German Kar(abiner) 98 rifle; Rhineland, Germany, April 1945.

Two MPs talking

A Hummel of the 9th SS Panzer Division “Hohenstaufen” makes its way along a snow track on the Russian front.
Hummel (German: "bumblebee") was a self-propelled gun chassis, equipped with a 15 cm howitzer. 

Hummel on the snowy road

Motorized German soldiers hold a brief meeting in an unspecified town