The 18th Tactical Fighter Wing based at Kadena AB, Okinawa maintained two Squadron of McDonnell F-4C Phantom II aircraft from November 1972 until May 1975. On 6 November 1972, the 18th Wing dispatched the McDonnell Douglas F-4C/D Phantom II fighters of 44th Fighter Squadron and 67th Fighter Squadron to the Ching Chuan Kang Air Base until 31 May 1975, to assist Taiwan's defense against aerial threats from China. The following are the units that the 18th Tactical Fighter Wing once stationed at Ching Chuan Kang Air Base in Taiwan： 44th Tactical Fighter Squadron (Tail Code: ZL) (6 November 1972 – 10 April 1975) (F-4C/D) 67th Tactical Fighter Squadron (Tail Code: ZG) (6 November 1972 – 31 May 1975) (EF-4C, F-4D) In March 1973, the number of US troops stationed at CCK was about 5,000. 16 September 1973 - A 44th Tactical Fighter Squadron F-4C aircraft crashed during a temporary duty assignment in Taiwan; the crewmembers safely ejected. 15 October 1973, an EF-4C 63-7462 of the 67th Tactical Fighter Squadron crashed shortly after takeoff from CCK AB. On 13 November 1973, the 374th TAW was reassigned to Clark AB Philippines. On November 15, 1973, the 6217th Combat Support Group was reactivation. On 1 September 1974, the 6217th Combat Support Group was renamed the 6217th Tactical Group. On 10 April 1975, the 44th Tactical Fighter Squadron of the 18th Tactical Fighter Wing withdrew from Ching Chuan Kang Air Base in Taichung, Taiwan, total of 24 McDonnell F-4C/D Phantom II fighters and 450 pilots and ground crews to Kadena Air Base in Okinawa. In May 1975, the 67th Tactical Fighter Squadron was withdrawn from CCK AB, Taiwan, with the final squadron of 18 F-4Cs departing for Kadena Air Base, Okinawa, between 27 and 31 May. From 1 June 1975, Due to the withdrawal of F-4 fighter jets, the 6217th Tactical Group was reorganized to the 6217th Air Base Squadron, and CCK AB had been placed in caretaker status. On 31 July 1975, the number of US troops stationed at CCK AB was 571. From 1977, the number of US troops stationed at CCK AB has been reduced to 100. On 1 January 1979, the US normalized relations with the People's Republic of China (PRC). on 25 April 1979, which resulted in the lowering of the national flag by US Air Force personnel and their withdrawal from the base.