What was a 4-F classification in World War 2?

Answer 1

After the draft was instituted in 1940, not all of the young men who registered were accepted into the service. Thirty percent of registrants across America were rejected for physical defects. The 4-F classification was given primarily for muscular and bone malformations, hearing or circulatory ailments, mental deficiency or disease, hernias, and syphilis. There were ramifications when a man got that classification. from nebraskastudies.org