O.
Occupation, Army of, [18]-[22], [81]; see also [Army].
Ohio rejects negro suffrage, [156], [285].
Ord, General E. O. C., commands military division, [140 (note)].
Oregon, election of 1876, [297], [298].
Orr, J. L., and negro education, [212].
Orth, S. P., The Boss and the Machine, cited, [282 (note)].