On 6 July 1966, Lieutenant Colonel Arthur J. Sullivan, battalion commander of 1st Recon Battalion, moved his battalion headquarters to Hau Doc, a location 25 km west of Chu Lai. For eight days his recon teams covered four-hundred square kilometers of his area of operation (AO); sighting forty-six PAVN that were scattered throughout the dense, rugged double- and triple- canopy jungle terrain, roughly ranging of 200 soldiers at most. The ground combat and supporting elements resulted only in thirteen PAVN killed, with four prisoners. Because of the poor results, General Lewis J. Fields, the commanding general of the Chu Lai TOAR, ended the operation on July 14, 1966.