By August 13, KPA troops were operating in the mountains west and southwest of Yongil Airfield. USAF commanders, wary of KPA attacks, evacuated the 39th Fighter Squadron and 40th Fighter Squadron from the airstrip, against the wishes of General MacArthur. In the event, the airstrip remained under the protection of UN ground forces and never came under direct fire. The squadrons were moved to Tsuiki Air Field on the island of Kyushu, Japan. In the meantime, the ROK 3rd Division, surrounded earlier in the month, was forced further south to the village of Changsa-dong, where US Navy craft amphibiously withdrew the division. The division would sail south to Yongil Bay to join the other UN forces in a coordinated attack to push the KPA out of the region. This evacuation was carried out on the night of August 16.