vietnamese and the viet-kong. >> the plan that the north vietnamese conceived would be a two-year plan. what happened was that when attacking the central highlands town of ban my thuit the thieu government lost its composure. >> government troops were secretly ordered by president thieu to pull out of the central provinces. >> the withdrawal became a rout, civilians and soldiers fleeing in panic, leaving behind huge supplies of american-made war materials. >> the north vietnamese never dreamed it would result in such a dramatic decision as to abandon the highlands which had been fought over for 12 years so they reconvened their central military committee and determined that the iron is hot, and this is the time to strike. >> president thieu said he would not abandon the city, but the people are leaving anyway. the president said he would not abandon the city, and that city is gone. >> the world witnessed the tragedy of the overrunning of