Roden 814 Holt 75 Artillery Tractor w/BL 8-inch Howitzer 1:35

Soon after the turn of the century, American inventor Benjamin Holt built an agricultural machine with a gasoline internal combustion engine and a chassis running on crawler tracks, which proved to be very successful in design, and was copied not only in the United States, but also in England and France, as well as in some other countries. The vehicle was classified as a "tractor" and was named the Holt 75. Even before the start of the First World, these machines were already being used extensively in agriculture, however, not as yet for any military purposes.

After successful tests in quarry sites, where in contrast to the horses the Holt 75 easily towed not only the 6-inch but also the super-heavy 9-inch guns, it was decided to acquire them for the needs of the Royal Artillery Corps immediately. Of course, the speed of the tractor was very low - it could tow a gun at only 2 miles per hour, but even this performance figure outweighed the significant losses of military animals due to their exhaustion in delivery of the guns, especially in off-road conditions.