Question: What type of land vehicle is associated with the brands Field Marshall of Gainsborough, Lincolnshire and Track Marshall who produce earthmoving equipment and were active during WWII building tanks?
Sentence (from "Track Marshall"): Track Marshall was a brand of earthmoving equipment who were active during WWII building tanks. Later, they produced a range of crawler tractors, based on the wheeled tractor "Field Marshall" brand.
Relevant evidence: Yes