According to TM 9-2800 (1 September 1943) War Department tractor / bulldozers were standardized under three general nomenclature groupings, with several commercially available models in each group, as follows:
Tractor, Light
Caterpillar Tractor Co. Model D4 (G-151)
International Harvester Model TD9 (G-99)
Tractor, Medium, M1
Allis-Chalmers Co. Model HD7W (G-125)
Caterpillar Tractor Co. Model D6 (G-69)
Cleveland Tractor Co.
International Harvester Co. Model TD14 (G-132)
Tractor, Heavy, M1
Allis-Chalmers Co. Model HD10W (G-98)
Caterpillar Tractor Co. Model D7 (G-126)
International Harvester Co. Model TD18 (G-101)
While other tractors were procured during WW II, those listed were the most common.
CHIMO! Derek.
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