The Army of the Potomac was the largest and most important army in the Union during the Civil War. It was commanded by Grant from June 1864 until the end of the war. The Army of the Tennessee was also a large and important army in the Union. It was commanded by Grant from October 1862 until February 1864. The Army of the James was a smaller army that was formed in 1864 to operate against Richmond, Virginia. It was commanded by Grant from February 1864 until June 1864.
The three horses at the Ulysses S. Grant Memorial are all named after famous horses that Grant rode during the Civil War. The horse representing the Army of the Potomac is named "Cincinnati." The horse representing the Army of the Tennessee is named "Jeff Davis." The horse representing the Army of the James is named "Egypt."
The Ulysses S. Grant Memorial is located on the National Mall in Washington, D.C. It was dedicated in 1922 and is one of the largest and most impressive memorials in the city.