Of course I wasn't there in the height of the Vietnam war, but all my 12+ years in the rest of SE Asia, the only fog I remember was in my head after consuming too much fermentation in the Ale the night before.
Musta been one of those LP/OPs at high altitude where the clouds envelope the mountains for a few hours to, well, a few more hours.
Yep, I woulda done just what he did under them conditions. Left my post and wandered around for three months in the jungle. I can'ts really talk too much about it though as it was a highly classified mission and we weren't really there. There's just something about being on the wrong side of an imaginary line the government says we wasn't over. Insomuchasfact, when I came upon them's Army compounds, I used my special forces super secret stealth techniques learned in the SERE school to keeps me from being detected by them's U.S. Army soldiers, while ins I resupplied my butt pack and canteen with potible (sic) water. Also's cants talk about what's I ate for them's three months in the bush, justs sometings (sic) you just gots to keep private. Can't talk about that's!

o