Motorcycles: Two-wheeled vehicles with an engine used by military messengers during World War I for quick transportation between units.
Trucks: Large motor vehicles designed to carry heavy loads over long distances. They played a crucial role in transporting troops, supplies, and equipment during World War I.
Airplanes: Powered flying machines used for reconnaissance missions, bombing raids, and aerial combat during World War I. Airplanes provided another dimension to mechanized transport and changed the nature of warfare.