Airoll is a system of vehicle propulsion that attempts to combine the strengths of air filled tires with those of caterpillar tracks to create an all-terrain amphibious vehicle while maintaining a reasonable speed and payload capacity. First conceived in the 18th century, the concept was still a novelty in the mid 20th century, which saw rapid development of the idea into practical vehicles by the United States, the Soviet Union, and multiple civilian enterprises. The most notable of these vehicles is perhaps the XM769 Marginal Terrain Vehicle, which is on display at the Marine Corps Mechanized Museum at Camp Pendleton, California.