No. The M60 or M60A1 might have seen action in Vietnam, but I think the M60A3 came out in late 70's. My last unit was 2nd Inf Div in Korea, and when I showed up in 1984 they were just swapping out the M49A5s for M60A3s. I think some US Marine tank units were the last units to use the M60A3s, and...