20 CFR 404.1322: Post-World War II service included.

Your service was in the active service of the United States during the post-World War II period if you were in the—

(a) Air Force, Army, Navy, Marine Corps, Coast Guard, or any part of them;

(b) Commissioned corps of the United States Public Health Service and were on active service during that period;

(c) Commissioned corps of the United States Coast and Geodetic Survey and were on active service during that period; or

(d) Philippine Scouts and performed active service during the post-World War II period under the direct supervision of recognized military authority.