The M4 18-ton High Speed Tractor was designed as a prime mover for towing large field artillery guns such as the 90mm Anti-Aircraft gun, the 155mm Long Tom, the 8in. Howitzer, or other heavy weapons (See the Towed Artillery Chart). In addition to moving the gun, the M-4 High Speed Tractor carried ammunition in cargo space racks. Ten men plus the driver could be carried. The M-4 HST was manufactured by Allis-Chalmers Mfg. Co. of Milwaukee, WI starting in 1942 and was in U.S. military service until approximately 1960.
The M-4 High Speed Tractor was equipped with air and electric brakes that would match any types of brakes on the towed load.
An anti-aircraft .50 cal. machine gun on a ring mount was accessed through a hatch above the crew compartment.
M-4 High Speed Tractor
Today in WW II: 30 Aug 1941 German Lorenz SZ40 teleprinter operator sent a 4,000 character message twice, allowing British mathematician Bill Tutte and others at Bletchley Park to decipher the machine's coding mechanism. More↓
30 Aug 1942 Germany formally annexes Luxembourg to the German Reich, triggering a general strike the next day protesting German Army conscription. 30 Aug 1942 Battle of Alam el Halfa, between Rommel's German force and British Commenwealth troops under Montgomery, south of El Alamein, the end of last major Axis offensive of their Western Desert campaign [30 Aug-5 Sep]. 30 Aug 1944 Last remnants of German forces retreat across the Seine River, bringing Operation Overlord to a successful conclusion. Visit the Olive-Drab.com World War II Timeline for day-by-day events 1939-1945! See also WW2 Books.