Virginia--History--Civil War, 1861-1865--African Americans]]> Petersburg (Va.)--History--Siege, 1864-1865]]> Military discipline--United States--History--19th century]]> Becker, Joseph, 1841-1910]]> Virginia--Dinwiddie--Petersburg]]> Virginia--History--Civil War, 1861-1865--Artillery operations]]> Peebles Farm, Battle of, Va., 1864]]> Fortification--Virginia]]> Becker, Joseph, 1841-1910]]> Virginia--Dinwiddie--Petersburg]]>