"The Union forces which operated in Virginia in the Civil War were known as the "Army of the Potomac." It was organized by Gen. George B. McClellan in 1861, and served under him in the Peninsular campaign and later in that of Antietam. General Burnside took command in 1862, and General Hooker in 1863. General Meade was in command when the victory at Gettysburg was won, in July, 1863, and continued in charge during General Grant's operations in 1864-1865."—(Charles Leonard-Stuart, 1911)

Badge of the Army of the Potomac

"The Union forces which operated in Virginia in the Civil War were known as the "Army of the Potomac."…