1) The "Prison Camps" category will serve as a place for burials and prisoner of war listings.
2) Never add a soldier directly to this category. Add a soldier to his correct regiment as a category first. A "Grave", "Burial", or "POW" listing can then be added to that category. Using the "manage" feature in the listing submission form you can have that listing "also appear in" this category.
3) Read the tutorial section prior to submitting any material.