This is a military hummer. I know what you are saying you can also get a 37" hummer tire
36" (what I have on my truck)
these are the 37's you are speaking of. A little less agressive, but a bigger tire.
I happened to be in the military, and rode in hummers with both different sets of tires. Maybe next time I am on base I will stop and take pictures of dozens of them with both different applications on them.
HOWEVER, you may be right about the CUCV's. they may have just been put on in different units (may not have came with them).