The Army of the Potomac was the primary field army of the Union army in the Eastern Theater of the American Civil War. It was created in July 1861 shortly after the First Battle of Bull Run and was disbanded in June 1865 following the surrender of the Confederate Army of Northern Virginia in April.
William Woods Averell was a career United States Army officer and a cavalry general in the American Civil War. He was the only Union general to achieve a major victory against the Confederates in the Valley Campaigns of 1864 prior to the arrival of Philip Sheridan, at the Battle of Rutherford's (Carter's) Farm and at the Battle of Moorefield.
William Farrar Smith, known as "Baldy" Smith, was a Union general in the American Civil War, notable for attracting the extremes of glory and blame. He was praised for his gallantry in the Seven Days Battles and the Battle of Antietam, but was demoted for professional and political reasons after the disastrous defeat at the Battle of Fredericksburg. As chief engineer of the Army of the Cumberland, he achieved recognition by restoring a supply line that saved that army from starvation and surrender, known as the "Cracker Line", that helped Union troops to success in the Chattanooga Campaign in the autumn of 1863. Leading the first operation against Petersburg, Smith's caution, possibly illness-related, may have cost the Union a prime opportunity for a quick end to the war. He was relieved of command shortly thereafter.
William Buel Franklin was a career United States Army officer and a Union Army general in the American Civil War. He rose to the rank of a corps commander in the Army of the Potomac, fighting in several notable battles in the Eastern Theater of the Civil War. He also distinguished himself as a civil engineer before and after the war.
I Corps was the designation of three different corps-sized units in the Union Army during the American Civil War. Separate formation called the I Corps served in the Army of the Ohio/Army of the Cumberland under Alexander M. McCook from September 29, 1862 to November 5, 1862, in the Army of the Mississippi under George W. Morgan from January 4, 1863 to January 12, 1863, and in the Army of the Potomac and Army of Virginia. The first two were units of very limited life; the third was one of the most distinguished and veteran corps in the entire Union Army, commanded by very distinguished officers. The term "First Corps" is also used to describe the First Veteran Corps from 1864 to 1866.
Joseph King Fenno Mansfield was a career United States Army officer and civil engineer. He served as a Union general in the American Civil War and was mortally wounded at the Battle of Antietam.
George Archibald McCall was a United States Army officer who became a brigadier general and prisoner of war during the American Civil War. He was also a naturalist.
William Hays was a career officer in the United States Army, serving as a Union Army general during the American Civil War.
The 118th Pennsylvania Regiment was a volunteer infantry regiment in the Union Army during the American Civil War. They participated in several major conflicts during the war including the Battle of Gettysburg, Siege of Petersburg, and escorted the truce flag of Robert E. Lee at the Battle of Five Forks. The regiment was led by Colonel Charles Prevost until he was seriously injured at the Battle of Shepherdstown in which Lieutenant-Colonel James Gwyn assumed command until the end of the war.
The 6th Wisconsin Infantry Regiment was an infantry regiment that served in the Union Army during the American Civil War. It spent most of the war as a part of the famous Iron Brigade in the Army of the Potomac.
Marsena Rudolph Patrick was a college president and an officer in the United States Army, serving as a general in the Union volunteer forces during the American Civil War. He was the provost marshal for the Army of the Potomac in many of its campaigns.
The 2nd Rhode Island Infantry Regiment was an infantry regiment composed of volunteers from the state of Rhode Island that served with the Union Army in the American Civil War. They, along with the 1st Rhode Island, wore a very simple uniform. The uniform composed of a dark blue jacket like shirt, tannish grey pants, and a dark blue chasseur kepi. The 2nd Rhode Island also wore havelocks in the beginning of the war, but after finding them useless they discarded them.
Benjamin Caspar Christ was an officer in the Union army during the American Civil War. He commanded a brigade in the IX Corps of the Army of the Potomac at several important battles, including the Battle of Antietam.
The 27th New York Infantry Regiment was an infantry regiment formed in Elmira, New York, to fight and defend the United States during the American Civil War. The regiment was also known as the "Union Regiment".
The Raid on Chambersburg, often identified as J.E.B. Stuart's Chambersburg Raid, was a Confederate States Army cavalry raid into Maryland and Pennsylvania on October 10–12, 1862 during the American Civil War. It became known as Stuart's "second ride around McClellan" because it duplicated Stuart's reconnaissance ride completely around the Union Army of the Potomac under Major General George B. McClellan during the ill-fated Peninsula Campaign.
The 4th New Jersey Infantry Regiment was an infantry regiment in the Union Army during the American Civil War. Overall, the regiment lost 5 officers and 156 enlisted men killed or mortally wounded and 2 officers and 103 enlisted men to disease during the Civil War. The regiment's first commander, Colonel James H. Simpson, helped lead the 4th N.J through the hardships of the first year of campaigning.
The 49th Pennsylvania Volunteer Infantry was an infantry regiment that served in the Union Army during the American Civil War.
David Bell McKibbin was a United States Army officer who was made a brevet brigadier general in the final weeks of the American Civil War.
Richard Henry Rush was an American military officer who served in the United States Army during the Mexican-American War and the Union Army during the American Civil War. He mustered and served as colonel in the 6th Pennsylvania Cavalry Regiment from October 1861 to September 1862.
Thomas Ellwood Rose (1830-1907) was an American Brevet Brigadier General during the American Civil War. He commanded the 77th Pennsylvania Infantry Regiment who participated through the Chickamauga campaign and the Atlanta campaign. After being captured at the Battle of Chickamauga, he was detained at Libby Prison but Rose managed to be the ultimate mastermind behind the Libby Prison escape using simple and meager tools to dig a tunnel through the prison.
United States (Union)
United States Army (Union Army)
Colonel 
Bvt. Brigadier General