1. There are "Military biography" and "Naval biography" subject headings.
2. You can use the subdivision "Biography" after types of military organizations, units, and types of soldiers. For example,
- Admirals -- United States -- Biography
- Air force spouses -- Biography
- Air pilots -- German -- Biography
- Armed forces -- Biography
- Generals - Biography
- Great Britain. Royal Navy -- Biography
- Guerrilla warfare -- South Africa -- Biography
- Indians in military service -- Biography
- Marines -- Biography
- Prisoners of war - Iraq -- Biography
- Soldiers -- Africa, East -- Biography
- Women soldiers -- China -- Biography
3. The subdivision "Personal narratives" is used for war memoirs. Example: Korean
War, 1950-1953 -- Personal narratives, American.