 Escalation of fighting in South Vietnam in early 1965 brought new offensive assignments.On 8 February 1965 USAF and VNAF aircraft assaulted targets north of the demilitarized zone in the first of a series of continuing strikes.On 19 February 1965, USAF F-100 Super Sabres and B-57 Canberras attacked the Viet Cong inside South Vietnam, the first use of jets for such offensive actions.