4, 512. 1969 doesn't match any critical dates of Kerry's 120 days in Vietnam: His first action was 2-3 December 1968, and his second "medal" was the third week of Feb, 1969.
His last was mid-March, (about March 17) 1969 ... and he was never in the field aftert hat - Kerry was holed up in the headquarters until he left.
And he was never in the field in any part of April (4 ..1969) 1969 or May (5 .. 1969) because he'd already gotten transferred home to his Maritime admiral aide billet in NY by then.