Santa Margarita, CA Show

Evidently there's an old tractor/ truck show there every year.
Here are some pictures from my uber-collector friends the Boyajians.
My guess: the tractor is a Holt.
The 4wd is an early Army truck made by...? Two companies made them? What were they? FWD and..?
Looks like one Liberty-pattern WWI truck?
The truck with the huge windshield is fabulous!