Nye's (George H.) Infantry. See Maine Troops, 29th Regiment.

O'Connell's (John D.) Infantry. See Union Troops, Regulars, 14th Regiment, 1st and 2nd Battalions.

Olcott's (Egbert) Infantry. See New York Troops, 121st Regiment.

Oneida Cavalry. See New York Troops.

O'Neill's (Henry) Infantry. See Pennsylvania Troops, 118th Regiment.

Orr's (Moses E.) Infantry. See New York Troops, 96th Regiment.

Otey Artillery. See Virginia Troops, Confederate.

Overmyer's (John B.) Infantry. See Pennsylvania Troops, 11th Regiment.

Paddock's (Charles H.) Artillery. See Union Troops, Regulars, 5th Regiment, Battery F.

Page's (John H.) Infantry. See Union Troops, Reulars, 3rd Regiment.

Palmetto Sharpshooters, Infantry. See South Carolina Troops.

Parker's (Ezra K.) Artillery. See Rhode Island Troops, 1st Regiment, Battery E.

Parker's (John H.) Heavy Artillery. See New York Troops, 10th Regiment.

Parr's (John G.) Infantry. See Pennsylvania Troops, 139th Regiment.

Parsons' (Augustin N.) Artillery. See New Jersey Troops, 1st Battery.

Parsons' (Charles C.) Artillery. See Union Troops, Regulars, 4th Regiment, Batteries F and H.

Parsons' (Joseph M.) Heavy Artillery. See Massachusetts Troops, 3rd Regiment, Battery L.

Partridge's (Benjamin F.) Infantry. See Michigan Troops, 16th Regiment.

Patapsco Buards, Infantry. See Maryland Torops, Union.

Patchell's (James) Infantry. See Pennsylvania Troops, 102 Regiment.

Patterson's (Joab N.) Infantry. See New Hampshire Troops, 2nd Regiment.

Patton's (alexander G.) Cavalry. See New York Troops, 7th Regiment.

Patton's (John S.) Artillery. See Indiana Troops, 16th Regiment.

Peale's (Henry) Infantry. See Connecticut Troops, 18th Regiment.

Peck's (Lewis M.) Infantry. See New York Troops, 173rd Regiment.

Peden's (Milton) Infantry. See Indiana Troops, 147th Regiment.

Peirce's (Charles H.) Artillery. See Union Troops, Regulars, 2nd Regiment, Batteries C and E.

Peirpoint's (Larkin) Infantry. See West Virginia Troops, 6th Regiment.

Pell's (Abijah S.) Infantry. See Union Troops, Colored, 8th Regiment.

Penick's (Nathan) Artillery. See John W. Lewis' Artillery, ante.

Perkins' (Benjamin R.) Infantry. See Union Troops, Regulars, 12th Regiment, 1st Battalion.

Perkins' (Joseph G.) Infantry. See Union Troops, Colored, 19th Regiment.

Per Lee's (Samuel R.) Infantry. See New York Troops, 114th Regiment.

Perry's (Clinton) Sharpshooters. See New York Troops, 1st Battalion.

Petersburg Artillery. See Virginia Troops, Confederate.

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

Pickering's (John, jr.) Heavy Artillery. See Massachusetts Troops, 3rd Regiment, Battery I.

Pier's (Colwert K.) Infantry. See New York Troops, 109th Regiment.

Pierce's (Francis E.) Infantry. See New York Troops, 108th Regiment.

Pierce's (George W.) Heavy Artillery. See Massachusetts Troops, 3rd Regiment, Battery H.

Pierson's (James M.) Engineers. See New York Troops, 15th Regiment.

Pierson's (Warner H.) Cavalry. See Michigan Troops, 1st Regiment.

Pifer's (George D.) Infantry. See Pennsylvania Troops, 53rd Regiment.

Platner's (John S.) Cavalry. See New York Troops, 1st Regiment (Veteran).

Platt's (Thomas J.) Infantry. See Ohio Troops, 62nd Regiment.

Plympton's (Homer A.) Infantry. See Illinis Troops, 39th Regiment.

Pollack's (John) Infantry. See Massachusetts Troops, 40th Regiment.