What Era is This?

I'm thinking more like Vietnam era than WWII.
What do you think? It's $250. I LOVE military stuff.

I have no hard fact to say one way or the other, but would tend to agree with you. Not sure how to tell Korea vintage from "Nam either. I can on the trucks, but not trailers.

CB, I bought a WWII-era "US War Dept TM-2800" Vehicle ID Manual off ebay back when ebay was new.
My eyes opened wide. It's amazing the "militarization" of vehicles that took place in such a short time.
Pre-WWII military vehicles were mostly civilian vehicles with a few special details.
Starting with the Jeep and the 4wd Dodge stuff, US Army vehicles morphed into what anyone can tell is an "Army Truck".
These trailers look very much the same for fifty years?