The skunk weed (indica) is native to the Afghanistan area, originally. It was highly prized, back in the day.
In Vietnam we could get Thai Sticks and those were as good as any pot today, some even had liberal amounts of opium. Consumed in great quantities by all. Get down wind and you could smell a camp from a long ways out. I’ve been in the A Shau when you could smell other platoons up wind of you. That was usually a good thing since the NVA wasn’t much for smoking weed but the VC were so you had to be careful when weed was hanging in the air. Nothing gave away one position more than pot smoke but I guess after a while we just didn’t give a chit anymore.