The Vietcong were masters of what is known as guerrilla warfare or guerrilla tactics during the conflict in Vietnam.
They could blend in with and move through the local terrain much better than U.S. forces. Most of the Vietcong were young, impressionable teens. At first timid, they were given political instruction and training to increase their level of commitment and confidence. To further their advantage, they used these guerrilla tactics. Rather than large, drawn out battles, they utilized ambushes and traveled through a system of hidden tunnels. The tunnels connected huge networks of store rooms, quarters, kitchens and even hospital type care areas. Landmines, boobytraps and the element of surprise further helped the Vietcong succeed.
The Vietcong became highly successful at stealing U.S. weaponry and eventually amassed a huge store of stolen weapons, using their own weapons against the U.S. forces.