This is an injection-plastic military vehicle model kit.
From the manufacturer:
The FWD Model B 3-ton lorry was an American truck of the World War I period, created by the Four Wheel Drive Auto Company in 1912. Like all machines of that time, it had quite a primitive design, but one particular innovation (the engine over the frame and the driver's cabin shifted forward) revolutionized the automotive industry. The FWD Model B was widely used in World War I. Of the total of 17,555 built, the vast majority (17,473) went to the U.S. Army, while another 3,000 were sold to Great Britain. Trucks of this type were widely used not only in their usual role, but as mobile repair shops, ammunition carriers and tractors for heavy artillery, such as the Vickers Mk.VI howitzer.