How did the Viet Cong use tunnels?

Question: How did the Viet Cong use tunnels!?

This is a question I have in US history for the Vietnam war!. And I need help!. Thanks!Www@QuestionHome@Com

Best Answer - Chosen by Asker:

They used tunnels to evade/outsmart Americans during that war!.

They used them as shelter, hideouts, escape, communication medium, as hospital/clinics too!.Www@QuestionHome@Com