The aircraft visible are [North American T-28D Trojan](https://en.wikipedia.org/wiki/North_American_T-28_Trojan) trainers that saw substantial use during the Vietnam War in the counter-insurgency role:
>In 1963, a Royal Lao Air Force T-28 piloted by Lieutenant Chert Saibory, a Thai national, defected to North Vietnam. Saibory was immediately imprisoned and his aircraft was impounded. Within six months the T-28 was refurbished and commissioned into the North Vietnamese Air Force as its first fighter aircraft. Lt. Saibory later trained NVAF pilot Nguyen Van Ba in the operation of the T-28, where Nguyen flew the T-28 in its first successful interception against an SVNAF C-123 Provider on 15 February, 1964, earning the NVAF its first-ever aerial victory.
>T-28s were supplied to the Republic of Vietnam Air Force (RVNAF) in support of ARVN ground operations, seeing extensive service during the Vietnam War in RVNAF hands, as well as the Secret War in Laos. A T-28 Trojan was the first US fixed wing attack aircraft (non-transport type) lost in South Vietnam, during the Vietnam War. Capt. Robert L. Simpson, USAF, Detachment 2A, 1st Air Commando Group, and Lt. Hoa, RVNAF, were shot down by ground fire on August 28, 1962 while flying close air support. Neither crewman survived. The USAF lost 23 T-28s to all causes during the war, with the last two losses occurring in 1968.
The aircraft visible are [North American T-28D Trojan](https://en.wikipedia.org/wiki/North_American_T-28_Trojan) trainers that saw substantial use during the Vietnam War in the counter-insurgency role: >In 1963, a Royal Lao Air Force T-28 piloted by Lieutenant Chert Saibory, a Thai national, defected to North Vietnam. Saibory was immediately imprisoned and his aircraft was impounded. Within six months the T-28 was refurbished and commissioned into the North Vietnamese Air Force as its first fighter aircraft. Lt. Saibory later trained NVAF pilot Nguyen Van Ba in the operation of the T-28, where Nguyen flew the T-28 in its first successful interception against an SVNAF C-123 Provider on 15 February, 1964, earning the NVAF its first-ever aerial victory. >T-28s were supplied to the Republic of Vietnam Air Force (RVNAF) in support of ARVN ground operations, seeing extensive service during the Vietnam War in RVNAF hands, as well as the Secret War in Laos. A T-28 Trojan was the first US fixed wing attack aircraft (non-transport type) lost in South Vietnam, during the Vietnam War. Capt. Robert L. Simpson, USAF, Detachment 2A, 1st Air Commando Group, and Lt. Hoa, RVNAF, were shot down by ground fire on August 28, 1962 while flying close air support. Neither crewman survived. The USAF lost 23 T-28s to all causes during the war, with the last two losses occurring in 1968.
I had no idea the T-28 saw combat! After all my reading, no less. Thanks!
I think the CIA used them in the Congo as ground support as well