Purdue Libraries have access to a wide variety of government and non-government information resources for conducting scholarly research on African military history and policy. The Libraries online catalog is a useful place for starting your search and examples of Library of Congress subject headings (LCSH) you can use for such searches includes:
Africa Strategic Aspects
Child Soldiers
Conflict Diamonds
Genocide Sudan Darfur
Lord's Resistance Army
National Security Africa
National Security South Africa
United States Africa Command
The Catalog of Government Publications is a good source for looking up U.S. Government Publications from July 1976-present with many of these being full text.