section 21, also known as the nurses section, is the area of arlington national cemetery where many nurses are buried. the nurses memorial is there. in the cemetery, there is a confederate section with graves of soldiers of the confederate states of america and a confederate memorial. all confederate headstones are peaked rather than rounded. in section 27, there are buried more than 3,800 former slaves, called "contrabands" during the civil war. their headstones are designated with the word "civilian" or "citizen".