Clinton, Bush 43, and Trump were all born within a 2 month period in 1946.
JFK, Nixon, Ford, Reagan and Bush 41 all served in fairly junior roles in WW2, even if Reagan just made training films and so on. LBJ pretended to serve in the same war. (He went out on one bombing mission as some kind of observer and was awarded a Silver Star, after which he stopped bothering the military and went back to his real career.)