25 March 1966 – Lt. Col. R. C. W. Blessley flew an F-111 A on the longest low-level penetration flight to date (1,201.8 miles). He flew 1,000 feet above terrain ranging from 500 feet to over 10,000 feet.
25 March 1968 – Four F-111As flew the first F-111 combat mission from Takhli AB, Thailand, under radar control to target areas northwest of Doug Hoi, North Vietnam.
Source: Wikipedia Aviation: Anniversaries