I've heard it said that the generation born roughly 1927 - 1940 is known as "the silent generation" as they were too young to be part of "the greatest generation" but too old to be considered "boomers". My parents were born 1930 and 31, married in 1952, young adults in the 50's and 60's, had me in 1972 (talk about a generation gap). They were on the cusp between two distinct generations and I've never really known where to place them.
My mother was born in 1927, and most of the boys in her class fought in WWII. They turned 18 in 45, and a lot joined when they were 17. Sad to see how many in that little class died in the waning days of the war!