If someone was serving in Korea at this time, they aren't going to show up in these records, are they? EDIT - the Census would have been conducted in spring 19

If someone was serving in Korea at this time, they aren't going to show up in these records, are they? EDIT - the Census would have been conducted in spring 1950, while the first troops arrived in July 1950. So presumably they would have been on military bases in the US and then perhaps counted in the census...