Gun Trucks

[Sanjuro]

Would individual divisions have their own organic long-range transport units or would such line haul convoys be the specialty of Corps HQs?

It would depend on how scarce the vehicles were; if suitable trucks are plentiful, individual divisions could have their own (although Corps HQ might allocate the fuel). The scarcer the vehicles, the more likely Corps is to maintain control, to make sure each division gets its fair share.