While the Revolutionary and Civil wars have been the object of much research and documentation, the war that bridged them has been comparatively neglected. This comprehensive research guide summarizes the careers of President and Commander-in-Chief James Madison, his three secretaries of war, nine major generals, and 27 brigadier generals, and traces the operations of various departments, five artillery regiments, three cavalry regiments, the Corps of Engineers, 48 infantry regiments, and four rifle regiments of the United States during the War of 1812. For each it provides a bibliography of primary and secondary sources and a listing of manuscripts and archival resources. A directory of more than 100 manuscript repositories and their addresses is included.