Gettysburg Union order of battle
Division Brigade Regiments and Others
First Division MG David B. Birney BG J. H. Hobart Ward ( w ) 1st Brigade BG Charles K. Graham ( w & c ) Col Andrew H. Tippin Col Henry J. Madill 57th Pennsylvania ( 8 companies ) : Col Peter Sides ( w , July 2 ) , Maj William B. Neeper ( w & c ) , Cpt Alanson H. Nelson ( w ) 63rd Pennsylvania : Maj John A. Danks 68th Pennsylvania : Col Andrew H. Tippin , Ltc Anthony H. Reynolds ( w ) , Maj Robert E. Winslow ( w ) , Cpt Milton S. Davis 105th Pennsylvania : Col Calvin A. Craig 114th Pennsylvania : Ltc Frederick F. Cavada ( c ) , Cpt Edward R. Bowen 141st Pennsylvania : Col Henry J. Madill , Maj Israel P. Spaulding ( mw & c )
First Division MG David B. Birney BG J. H. Hobart Ward ( w ) 2nd Brigade BG J. H. Hobart Ward Col Hiram Berdan 20th Indiana : Col John Wheeler ( k ) , Ltc William C. L. Taylor ( w ) 3rd Maine : Col Moses B. Lakeman , Maj Samuel P. Lee ( w ) 4th Maine : Col Elijah Walker ( w ) , Maj Ebenezer Whitcomb ( mw ) , Cpt Edwin Libby 86th New York : Ltc Benjamin L. Higgins ( w , July 2 ) , Maj Jacob A. Lansing 124th New York : Col Augustus van H. Ellis ( k ) , Ltc Francis M. Cummins ( w ) , Maj James Cromwell ( k ) 99th Pennsylvania : Maj John W. Moore ( w ) , Cpt Peter Fritz , Jr. 1st United States Sharpshooters : Col Hiram Berdan , Ltc Casper Trepp 2nd United States Sharpshooters ( 8 companies ) : Maj Homer R. Stoughton
First Division MG David B. Birney BG J. H. Hobart Ward ( w ) 3rd Brigade Col P. Régis de Trobriand 17th Maine : Ltc Charles B. Merrill , Maj George W. West 3rd Michigan : Col Byron R. Pierce ( w ) , Ltc Edwin S. Pierce , Maj Moses B. Houghton 5th Michigan : Ltc John Pulford ( w ) , Maj Salmon S. Matthews ( w ) 40th New York : Col Thomas W. Egan ( w ) , Ltc Augustus J. Warner ( w ) 110th Pennsylvania ( 6 companies ) : Ltc David M. Jones ( w July 2 ) , Maj Isaac Rogers
Second Division BG Andrew A. Humphreys 1st Brigade BG Joseph B. Carr ( w ) 1st Massachusetts : Ltc Clark B. Baldwin ( w ) , Maj Gardner Walker ( w ) 11th Massachusetts : Ltc Porter D. Tripp , Maj Andrew N. McDonald ( w ) 16th Massachusetts : Ltc Waldo Merriam ( w , July 2 ) , Cpt Matthew Donovan 12th New Hampshire : Cpt John F. Langley ( w ) , Cpt Thomas E. Barker 11th New Jersey : Col Robert McAllister ( w ) , Maj Philip J. Kearny ( mw ) , Cpt Luther Martin ( k ) , Lt John Schoonover ( w ) , Cpt William H. Lloyd ( w ) , Cpt Samuel T. Sleeper , Lt John Schoonover 26th Pennsylvania : Maj Robert L. Bodine ( w )
Second Division BG Andrew A. Humphreys 2nd Brigade Col William R. Brewster 70th New York : Col John E. Farnum 71st New York : Col Henry L. Potter ( w ) 72nd New York : Col John S. Austin ( w ) , Ltc John Leonard , Maj Caspar K. Abell 73rd New York : Maj Michael W. Burns 74th New York : Ltc Thomas Holt 120th New York : Ltc Cornelius D. Westbrook ( w , July 2 ) , Maj John R. Tappen
Second Division BG Andrew A. Humphreys 3rd Brigade Col George C. Burling 2nd New Hampshire : Col Edward L. Bailey ( w ) , Ltc James W. Carr ( w ) 5th New Jersey : Col William J. Sewell ( w ) , Cpt Thomas C. Godfrey , Cpt Henry H. Woolsey ( w ) 6th New Jersey : Ltc Stephen R. Gilkyson 7th New Jersey : Col Louis R. Francine ( mw ) , Ltc Francis Price ( w ) , Maj Frederick Cooper 8th New Jersey : Col John Ramsey ( w , July 2 ) , Cpt John Langton 115th Pennsylvania : Maj John P. Dunne
Artillery Brigade Cpt George E. Randolph ( w ) Cpt A. Judson Clark 1st New Jersey Light , Battery B : Cpt A. Judson Clark , Lt Robert Sims 1st New York Light , Battery D : Cpt George B. Winslow New York Light , 4th Battery : Cpt James E. Smith 1st Rhode Island Light , Battery E : Lt John K. Bucklyn ( w ) , Lt Benjamin Freeborn ( w ) 4th United States , Battery K : Lt Francis W. Seeley ( w , July 2 ) , Lt Robert James
Army of the Potomac -- III Corps
MG Daniel E. Sickles ( w ) MG David B. Birney ( w )
The Union order of battle during the Battle of Gettysburg includes the American Civil War officers and men of the Army of the Potomac (multiple commander names indicate succession of command during the three-day battle (July 1-3, 1863)). Order of battle compiled from the army organization during the battle, the casualty returns and the reports.