By 1959, the corps had become the Boston Crusaders, although they often were (and still are) referred to as "BAC" or the Boston Area Crusaders, and BAC was one of the East Coast powerhouse corps of the 1960s. They won the first CYO National Drum and Bugle Championship in 1964 and repeated as CYO champions in 1967 & '68. In 1966 and again in 1967 the Boston Crusaders were crowned World Open (class A) Champions. The corps was a finalist at VFW Nationals in 1969 & '70 and would have won the 1967 American Legion Junior Championship, if the powers-that-be had not voided the scores for the corps' inspection, allowing the Cavaliers to outscore them.[2][3]