 Following their defeat at Đà Nẵng, U.S. military intelligence agencies in I Corps Tactical Zone were confused by the movements of the 2nd Division, because they could not track down the unit.During March and April, U.S. military intelligence began to detect elements of the PAVN 2nd Division moving towards Khâm Đức, but their opponent's true intentions were largely unknown.In response to what could be a major attack, General William Westmoreland reinforced the defenses of the Khâm Đức Special Forces by sending in U.S. Army engineers to upgrade the local airstrip for sustained use by large transport aircraft, as well as airlifting weapons and ammunition for the U.S.-led Detachment A-105.