 Portée cavalry units were briefly tested in the American army during the interwar period change from fully-horsed cavalry to fully-mechanized cavalry but were generally found to be overcomplicated and not worthwhile.An Ordnance QF 2 pounder (40 mm) anti-tank gun mounted on a Morris 15 cwt truck, Chevrolet WA or WB 30 cwt truck, Canadian Military Pattern Ford F30 or Chevrolet C30 trucks and fired over the tailboard.An Ordnance QF 6 pounder (57 mm) anti-tank gun mounted on a Bedford QLT 3-ton lorry or Austin K5 3 ton lorry.