[Pyros]

I found evidence of NVA mortars

The first prisoner, taken at 1120, stated that there were three battalions of the enemy on the mountain above the landing zone who were just waiting for an opportunity to attack. Company A commanded by Captain Ramon A. Nadal, II, followed Company B into the landing zone unopposed and the perimeter expanded.

At 1330, B Company reported that it had been heavily attacked by at least two companies and its 2d platoon was in danger of being surrounded and cut off. Then 60-mm and 81-mm mortar fire began falling in the landing zone and on Company B

Withstanding repeated mortar attacks and infantry assaults, the
Americans used every means of firepower available to them-the division's own gunships, massive artillery bombardment, hundreds of strafing and bombing attacks by tactical aircraft, and earth-shaking bombs dropped by B-52 bombers from Guam