Orff's (Henry) Infantry. See Wisconsin Troops, 35th Regiment.

Osage and Maries Counties Militia. See Missouri Troops, Union.

Osband's (Embury D.) Cavalry. See Union Troops, Colored, 3rd Regiment.

Ovenshine's (Samuel) Infantry. See Union Troops, Regulars, 5th Regiment.

Owen's (Erastus N.) Heavy Artillery. See Union Troops, Colored, 5th Regiment.

Pacific Railroad Militia. See Missouri Troops, Union.

Paine's (James M.) Cavalry. See Minnesota Troops, 2nd Regiment.

Palen's (Rufus J.) Infantry. See Union Troops, Colored, 78th Regiment.

Palmer's (Andrew J.) Cavalry. See Wisconsin Troops, 2nd Regiment.

Palmer's (Milo E.) Infantry. See Union Troops, Veteran Reserve Corps, 23rd Regiment.

Parker's (Charles) Cavalry. See Illinois Troops, 17th Regiment.

Parker's (James) Infantry. See Union Troops, Colored, 77th Regiment.

Parker's (Livingston G.) Cavalry. See Kansas Troops, 5th Regiment.

Parker's (Thomas S.) Cavalry. See Iowa Troops, 7th Regiment.

Parkhurst's (Charles H.) Cavalry. See Rhode Island Troops, 3rd Regiment.

Patch's (Lewis J.) Cavalry. See Minnesota Troops, 2nd Regiment.

Pattee's (John) Cavalry. See Iowa Troops, 6th and 7th Regiments.

Pauls' (Thomas K.) Militia. See Wright County Militia, post.

Pawnee Scouts, Infantry. See Nebraska Troops.

Payne's (John W.) Infantry. See Union Troops, Veteran Reserve Corps, 4th Regiment.

Peabody's (Albert P.) Cavalry. Se Missouri Troops, Union, 1st Regiment.

Pearce's (Henry) Cavalry. See Kansas Troops, 11th Regiment.

Pearsall's (Uri B.) Infantry. See Wisconsin Troops, 48th Regiment.

Peck's (Henry W.) Heavy Artillery. See Wisconsin Troops, 1st Regiment, Battery D.

Peeble's (Ferdinand E.) Infantry. See Union Troops, Colored, 47th Regiment.

Peery's (Henry F.) Cavalry. See Missouri Troops, Union, 1st Regiment, State Militia.

Pelican Artillery. See Louisiana Troops, Confederate.

Perkins' (Caleb) Cavalry. See Missouri Troops, Confederate.

Perrault's (Hyppolite) Infantry. See New Orleans First Infantry, ante.

Perry's (Charles) Infantry. See Missouri Troops, Union, 50th Regiment.

Perry County Militia. See Missouri Troops, Union.

Perry's (Henry T.) Cavalry. See Wisconsin Troops, 3rd Regiment.

Perry's (Oran) Infantry. See Indiana Troops, 69th Regiment.

Pettis County Militia. See Missouri Troops, Union.

Pettis' (George H.) Infantry. See New Mexico Troops, 1st Regiment.

Pierce's (Alfred C.) Cavalry. See Kansas Troops, 11th Regiment.

Piercey's (Andrew J.) Cavalry. See Missouri Troop, Confederate, 1st Battalion, Indian Brigade.

Pike's (Christopher C.) Infantry. See Union Troops, Colored, 74th Regiment.

Piland's (William J.) Infantry. See Missouri Troops, Union, 46th Regiment.

Pindall's (Lebbeus A.) Sharpshooters. See Missouri Troops, Confederate, 9th Battalion.

Pine's (James A.) Cavalry. See Indiana Troops, 1st Regiment.

Plumb's (Preston B.) Cavalry. See Kansas Troops, 11th Regiment.

Pollock's (Samuel) Infantry. See Union Troops, Colored, 99th Regiment.

Pollock's (Samuel M.) Cavalry. See Iowa Troops, 6th Regiment.

Pond's (James B.) Cavalry. See Wisconsin Troops, 3rd Regiment.

Porter's (Charles) Infantry. See Union Troops, Regulars, 5th Regiment.

Porter's (Charles F.) Cavalry. See Nebraska Troops, 1st Battalion.

Porter's (Charles W.) Cavalry. See Wisconsin Troops, 3rd Regiment.

Porter's (Jim) Band. (Official designation not of record.) See Jim Porter.

Porter's (Thomas A.) Artillery. See Delaware Troops, 1st Battery.

Potter's (Carroll H.) Infantry. See Union Troops, Volunteers, 6th Regiment.

Powers' (Frank P.) Cavalry. See Louisiana Troops, Confederate.

Pratt's (William M.) Artillery. See Union Troops, Colored, 2nd Regiment, Battery D.

Praul's (Lafayette) Cavalry. See Missouri Troops, Union, 3rd Regiment, State Militia.