Orange Artillery. See Virginia Troops, Confederate.

Ormsby's (L.) Infantry. See New York Troops, 22nd Regiment.

O'Rorke's (Patrick H.) Infantry. See New York Troops, 140th Regiment.

Orr's (James L.) Infantry. See South Carolina Troops, 1st Rifles.

Orton's (William H.) Cavalry. See district of Columbia Troops.

Osborn's (Thomas W.) Artillery. See New York Troops, 1st Regiment, Battery D.

Otey's (G. G.) Artillery. See Virginia Troops, Confederate.

Overton's (Giles B.) Infantry. See Union Troops, Regulars, 14th Regiment, 2nd Battalion.

Owen's (Charles D.) Artillery. See Rhode Island Troops, 1st Regiment, Battery G.

Owen's (T. H.) Cavalry. See Virginia Troops, Confederate, 3rd Regiment.

Owens' (James D.) Infantry. See Pennsylvania Troops, 139th Regiment.

Page's (R. C. M.) Artillery. See Morris Artillery.

Palmetto Artillery. See south Carolina Troops.

Palmetto Sharpshooters Infantry. See South Carolina Troops.

Pardee's (Ario) Infantry. See Pennsylvania Troops, 147th Regiment.

Parham's (W. A.) Infantry. See Virginia Troops, Confederate, 41st Regiment.

Park's (Sidney W.) Infantry. See new York Troops, 2nd Regiment.

Parker's (F. M.) Infantry. See North Carolina Troops, 30th Regiment.

Parker's (Francis J.) Infantry. See Massachusetts Troops, 32nd Regiment.

Parker's (William W.) Artillery. See Virginia Troops, Confederate.

Parr's (L. J.) Infantry. See Georgia Troops, 38th Regiment.

Parsons' (J. B.) Infantry. See Massachusetts Troops, 10th Regiment.

Patapsco Guards Infantry. See Maryland Troops, Union.

Patrick's (John H.) Infantry. See Ohio Troops, 5th Regiment.

Patterson's (William H.) Artillery. See Sumter Artillery, Battery B.

Patton's (W. T.) Infantry. See Virginia Troops, Confederate, 7th Regiment.

Paxton's (John C.) Cavalry. See West Virginia Troops, 2nd Regiment.

Pearson's (H. H.) Infantry. See New Hampshire Troops, 6th Regiment.

Peck's (William) Cavalry. See new York Troops, 10th Regiment.

Pee Dee Artillery. See South Carolina Troops.

Peet's (William T.) Artillery. See C. R. Grandy's Artillery.

Pegram's (William J.) Artillery. See Purcell Artillery.

Peissner's (Elias) Infantry. See New York Troops, 119th Regiment.

Penehelstein's (A. von) Cavalry. See New York Troops, 4th Regiment.

Penn's (D. B.) Infantry. See Louisiana Troops, 7th Regiment.

Pennington's (Alexander C. M., jr.) Artillery. See Union Troops, Regulars, 2nd Regiment, Battery M.

Perkins' (Sanford H.) Infantry. See Connecticut Troops, 14th Regiment.

Perrin's (James M.) Infantry. See James L. Orr's Rifles.

Pettes' (William H.) Engineers. See New York Troops, 50th Regiment.

Pettis' (Rufus D.) Artillery. See New York Troops, 1st Regiment, Battery B.

Phelps' (C. E.) Infantry. See Maryland Troops, Union, 7th Regiment.

Phelps' (Charles R.) Infantry. See M. N. Moorman's Artillery. Regiment.

Philbrick's (Chase) Infantry. See Masschusetts Troops, 15th Regiment.

Phillips' (Charles A.) Artillery. See Massachusetts Troops, 5th (E) Battery.

Phillips' (W.) Infantry. See Phillips Legion.

Phillips' Legion. See Georgia Troops.

Phillips' (William H.) Artillery. See New York Troops, 1st Regiment, Battery C.

Pickens (Samuel B.) Infantry. See Alabama Troops, 12th Regiment.

Pierce's (B. R.) Infantry. See Michigan Troops, 3rd Regiment.

Pierce's (Horace T. H.) Infantry. See New Hampshire Troops, 5th Regiment.

Pierce's (Lewis B.) Cavalry. See Pennsylvania Troops, 12th Regiment.

Pierson's (J. Frederick) Infantry. See New York Troops, 1st Regiment.

Pinckard's (L.) Infantry. See Alabama Troops, 14th Regiment.