 By 22 July, the PAVN command at Da Trach apparently realised that the ARVN 2nd Infantry Regiment was not advancing into the trap in the Khe Le Valley.Plans were accordingly changed; the rest of the PAVN 1st Regiment was ordered to Da Trach to attack the ARVN 2nd Regiment in the hills south of Duc Duc, while the 38th Regiment was to move through the hills above the valley toward Go Noi and Điện Bàn District.On 24 July the 1st Regiment began moving into the attack, and the 38th Regiment started deploying east.