Badcoe became disillusioned with the war during his service in South Vietnam. He was particularly affected by an incident in February 1967 in which the ARVN regiment he was working with called in a napalm strike on a VC-occupied village, whose population was strongly supportive of the government, instead of attempting to attack and dislodge the VC. Badcoe and other advisers attempted to stop the use of napalm, but the ARVN divisional headquarters overruled them. A total of 40 civilians were killed or wounded, and Badcoe spent the next day-and-a-half arranging the removal of bodies and new accommodation for the survivors. He eventually concluded that the conflict was an "unwinnable war". On 7 April, Badcoe, who wrote frankly to his wife and children, penned a letter to them expressing his "unease and cynicism" about the conduct of the war and indicating that he wished to come home. At this time Badcoe was planning to take a short break on the Japanese island of Okinawa starting the following day, with an Australian Army friend who had been visiting him, observing operations.