What kind of clothing did they use at the time of the Vietnam war?

Answer 1

After landing with the original issue of cotton OG fatigues, US Soldiers (US Army) were issued jungle fatigues. This was rip-stop OG (Olive Green) material designed to be worn outside (not tucked into the trousers as were the original fatigues) and consisted of four pockets (two upper and two lower per side) and each pocket had tiny holes sewn into their bottoms for water to drain out.

The trousers were the same but had cargo side pockets also with sewn holes in them for water drainage and a string at the bottom of each leg to tie the bottom tight above the jungle boot. Most GIs didn't ear underware or T-shirts after awhile; the heat was to bad and they made good rags for cleaning weapons and equipment. The steel pot (M1 helmet) was the standard WWII helmet (although a newer batch was made up just for Vietnam in the late 1960s, 1 million of them-those can be identified by their very light Olive Green paint job and have a rust colored primer...factory new). US Soldiers (US Army) also wore the Baseball cap for the first time, instead of the French (Fidel Castro) cap, in OD (OG actually) of course.

Answer 2

Fatiques, OD/OG in color (Olive Green or Olive Drab).