Daily Ancestor4-F
4-F (IV-F in World War II) was the draft classification for a man rejected for military service for physical, mental or moral reasons.
In World War II, Class IV held men who were unacceptable for service or deferred by law, and IV-F was the class for those rejected on physical, mental or moral grounds. It was used from October 1940 to March 1947.
World War I had no 4-F as such: men judged medically disabled or morally unfit fell in Class V, the exempt class. A World War II classification history may also give the date and result of the man's armed forces physical examination.
As seen in a recordClassification history (SSS Form 102), World War II
Physical exam Apr. 14, 1943: rejected. Class IV-F
Sources
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Daily Ancestor. "4-F." Dictionary of Old Record Words. https://dailyancestor.com/dictionary/military/class-4-f. Last checked 2026-10-12.