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| 1959 | Ho Chi Minh Trail
Bam, Vo |  |
| May | Hanoi established the 559th Transportation Group under the command of Colonel (later General) Vo Bam to improve and maintain a transportation system to supply the Vietcong uprising against South Vietnamese Government |
| 1959 | Ho Chi Minh Trail
Chi-Minh, Ho | |
| May | Hanoi established the 559th Transportation Group under the command of Colonel (later General) Vo Bam to improve and maintain a transportation system to supply the Vietcong uprising against South Vietnamese Government |
| May | Creates Group 559 to enlarge the Ho Chi-Minh Trail into South Vietnam |
| May | Hanoi established the 559th Transportation Group under the command of Colonel (later General) Vo Bam to improve and maintain a transportation system to supply the Vietcong uprising against South Vietnamese Government |
| | US Air Force Operation Barrel Roll carries out the first systematic bombardment of the Ho Chi Minh trail in Laos |
| | After the initiation of Operation Rolling Thunder against North Vietnam, President Lyndon B Johnson gives approval for a corresponding escalation against the Ho Chi-Minh Trail |
| | The US command in Saigon estimates that Communist supply requirements for their southern forces amounted to 234 tons of all supplies per day and that 195 tons were moving through Laos |
| 1965 | Bombing of Ho Chi Minh Trail
Chi-Minh, Ho | |
| Mar 20th | After the initiation of Operation Rolling Thunder against North Vietnam, President Lyndon B Johnson gives approval for a corresponding escalation against the Ho Chi-Minh Trail |
| 1966 | Ho Chi Minh Trail
Chi-Minh, Ho | |
| June | Defense Intelligence Agency (DIA) estimate credited the North Vietnamese with 600 miles (970 km) of truckable roads within the corridor, at least 200 miles (320 km) of which were good enough for year-round use |
| | By the end of the year the North Vietnamese had completed 2,959 kilometers of vehicle capable roads, including 275 kilometers of main roads, 576 kilometers of bypasses, and 450 entry roads and storage areas |
| 1967 | Ho Chi Minh Trail
Nguyen, Dong Sy | |
| | A change in command of the 559th Group as Senior Colonel Dong Sy Nguyen assumes command |
| | The 559th Group is made the equivalent of a Military Region during 1970 and was once again placed under the command of General Dong Sy Nguyen |
