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| 1965 | Westmoreland, William |  |
| B52s are deployed for bombing in tth Vietnam against battle targets & Viet Cong bases |
| 18th June Ben Cat Operation Light I, bombing of Ben Cat Special Zone Viet Cong base, a limited success |
| Nov 82 B-52Ds are modified to carry 42 750-pound bombs |
| 15th Nov La Drang Valley B-52s support US ground forces for the 1st time |
| 1966 | McNamara, Robert | |
| Nov McNamara agrees to Westmorland's request for 600 sorties per month, achieved in Nov |
| 1966 | Westmoreland, William | |
| Mar Bien Hoa The 1st of 7 radar sites is established at Bien Hoa air base |
| 1st July Combat Skyspot allows 3rd Air Div to place B-52s as a quick reaction force |
| Nov McNamara agrees to Westmorland's request for 600 sorties per month, achieved in Nov |
| 1969 | Johnson, Lyndon Baines | |
| Cambodia becomes a target for Operation Arc Light |
| 1969 | Nixon, Richard Mulhouse | |
| 15th July The monthly sortie rate is reduced to 1,600 |
| Oct The monthly sortie rate is reduced to 1,400 |
| 1971 | Nixon, Richard Mulhouse | |
| 1st June The monthly sortie rate is reduced to 1,000 |
| 1972 | Nixon, Richard Mulhouse | |
| 30th Mar JCS increase the monthly sortie rate to 1,800 |
| April The monthly sortie rate is increased to 2,500 |
