The opening Nose tuberculosis campaign (7-11.2.1965), bombarded military targets and residential area in Vinh Linh, Quang Binh; from 2.3.1965, open operation rolling thunder (2.3.1965-31.10.1968) gradually escalated the war, expanded the scale using the air force bombarded the North in many modern aircraft, including the B-52 (from 4.1966). .
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