History Regimental histories Armies Medals, badges, decorations, etc Casualties (Statistics, etc Military law Recruiting, enlistment, etc Registers Statistics War World War, 1914-1918 Appointments and retirements Appomattox Campaign, 1865 Army of the Potomac Campaigns Civil War Description and travel Discovery and exploration Distances, etc Gettysburg Campaign, 1863 Hospitals Hospitals, charities, etc Indians of North America M Manoeuvers Maps Medal of Honor Medals Military departments and divisions Military geography Names, Personal Nicknames Officers Registers lists, etc Spanish-American War, 1898 United States Army