During WWII, the US turned to Harley-Davidson and Indian Motorcycle Company to produce military-worthy motorcycles. Other Allied powers also looked to these companies for bikes through the Lend-Lease program. As a result, Harley-Davidson produced the WLA, the U and UA, and the shaft-drive XA. Indian provided the 340-B and the 741, and the shaft-drive 841. Although the WLA, U/UA, 340-B, and 741 saw extensive military use, the shaft-drive bikes from both companies never saw combat. The advent of the Jeep took over the motorcycle's role in military service, and the bikes were relegated to veteran vehicles.