THERE WAS UP TO 40,000 PEOPLE WHO USED THIS TRAIL. FROM THE NORTH TO SOUTH.

U.S SPRAYED OVER 19 MILLION GALLONS OF HERBICIDES ON VIETNAM FROM 1961-1972.

U.S FORCES STARTED SENDING OUT "TUNNEL RATS" OUT TO SEARCH FOR BOOBY TRAPS.

WATER BOILS AT 212°F AND NAPALM CAN BOIL FROM 1,500°F TO 2,200°F.

IN 1968 THEY STOP USING THE TACTIC BECAUSE IT WAS AIMLESS SEARCHES.