From the 5 July 1969 1/35th Daily Journals

5 July 1969
LZ Ruth

At 1721 hours 1/35th ZA153405 reported a resupply bird (Alligator 443) received automatic weapons and ground to air fire from an estimated 5 individuals. There were no hits or casualties. Speed of aircraft was 80 knots at an altitude of 100 to 300 feet. Artillery was employed with undetermined results.