when did the viet cong end? how did it end?

2 answers

The Viet Cong were people. They didn't "end" unless you want to say that after the fall of Saigon in 1975, all Vietnamese were Vietnamese, no more north or south.

http://en.wikipedia.org/wiki/Vietcong
I'm not sure what you are asking. The Viet Cong were fighting units, so I am not sure what "it" refers to.

Since this is not my area of expertise, I searched Google under the key words "Viet Cong" to get these possible sources:

http://www.vietnampix.com/popvc.htm
http://www.infoplease.com/ce6/history/A0850864.html
http://www.encyclopedia.com/doc/1E1-VietCong.html
http://www.pbs.org/battlefieldvietnam/guerrilla/index.html

In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search.

I hope this helps. Thanks for asking.