Answer: mcml

AnswerCrossword Clue
MCMLYear in Pius XII's reign
MCML1950, on a cornerstone
MCML1950, in copyrights
MCMLWhen "Dianetics" was first published
MCMLSeveral years ago.
MCMLCaesar's 1950
MCMLCredits date for "Cinderella" or "All About Eve"
MCMLKorean War outbreak year
MCMLCaesar's 1,950
MCMLOvid's 1,950
MCMLCato's 1,950
MCMLYear on a Truman-era cornerstone
MCMLYear the Korean War began