The Raupenschlepper Ost (RSO) was a lightweight, fully tracked vehicle used by the German Wehrmacht in World War II. Designed to overcome the challenges of muddy and snowy conditions on the Eastern Front, it was based on the Steyr 1500A light truck. The RSO served in various roles, including general transport, prime mover, and artillery supply. Its simplicity, reliability, and versatility made it an invaluable asset for the Wehrmacht.