Wednesday, June 1, 1864
Earlier in the week General Ulysses S. Grant, ready to seize an opportunity to break the Confederate lines around Richmond, ordered a temporary detachment of the Eighteenth Corps from the Army of the James to join the Army of the Potomac at Cold Harbor.
Early this morning General William Smith, in charge of the Union Eighteenth Corps, realized he had been ordered in error to New Castle Ferry instead of New Cold Harbor. He immediately began the twelve-mile march to Cold Harbor, arriving around noon. This delay in deployment would prove fateful for the outcome of the ensuing battle.
Around 6:00 P.M. the Sixth Corps and General Smith's Tenth and Eighteenth Corps successfully charged the Confederate lines and took six-hundred prisoners by day's end. Portions of the conflict continued until midnight
1S. Millett Thompson, Thirteenth Regiment of New Hampshire Volunteer Infantry in the War of the Rebellion, 1861-1865 : A Diary Covering Three Years and a Day (Boston, Massachusetts: Houghton, Mifflin and Company, 1888), 338-40.