Question

What did the North Vietnamese Army do to Khe Sahn? What was the only way the base of
Khe Sahn could be supplied?

Answer 1

Answer:

The siege of Khe Sanh was broken by ground forces on 6 April. Americans destroyed the base complex of Khe Sanh and withdrew from the battle area in July 1968 (re-established in 1971). North Vietnamese Army gained control of the Khe Sanh region after the American withdrawal. Termination of the McNamara Line.

Explanation:

I copied and pasted your question  to google

Answer 2

Answer:

The NVA fired over 10,000 rockets, mortars, and artillery rounds — 360 a day on average, and 1,300 during the heaviest bombardment. Combat was so intense that the Khe Sanh Combat Base was completely surrounded and cut off, leaving the only way to resupply the base by air.Jan 26, 2018

Explanation:

by air cause math and google