Bob, from the 1 Nov 1968 1/35 Daily Journal regarding NVA helicopters. Another journal actually documents a helicopter unit being sent to chase down some suspected NVA helicopters.

During the reporting several sightings were made of rotary wing and fixed wing aircraft within our A/O starting at 0156 hours through 0655 hours and again at 2305 hours through 2358 hours aircraft appeared to be heading west. Frag orders was sent to C Company from the S-3, have a platoon (-) conduct a sweep to the south of LZ Jean starting at 1000 hours and completing at 1700 hours. The platoon will sweep the following areas grids 8122, 8120, 8320 and 8322. Sitrep will go to this Headquarters every hour. The following intelligence will be reported, possible chopper sighting landing at night location, effect of artillery fired in this area during the last 2 days, any activity in the last few days. Be prepared to reinforce with the entire Company if the platoon makes contact with a large force. The platoon reported to the S-3 after the sweep was completed the following findings: Footprints heading in a northerly direction 50 meters circle of grass blown down, grass was cut down further around the circle, 4 other areas of 50 meters at grid YA814215. The patrol reported finding a night location that had been used in the last 48 hours.