Ruger led a brigade of XX Corps in Maj. Gen. William T. Sherman's Atlanta Campaign until November 1864, and with a division of XXIII Corps took part in the campaign against GeneralJohn B. Hood's army in Tennessee. He was appointed a brevetmajor general of volunteers, November 30, 1864, for services at the Battle of Franklin. Ruger organized a division at Nashville and led his command to North Carolina in June 1865, and then had charge of the department of that state until June 1866.[2] He was mustered out of his volunteer commission, accepting a regular army commission as colonel, July 28, 1866, and on March 2, 1867, was brevetted brigadier general, regular army, for his services at Gettysburg.
^Spruill, Matt (2011). Decisions at Gettysburg : The Nineteen Critical Decisions That Defined the Campaign. Knoxville: University of Tennessee Press. p. 74. ISBN978-1572337459.