Monday, December 1, 1862
Along with the First Brigade, the Thirteenth New Hampshire Regiment broke camp at noon and formed in line. At 2:00 P.M. they marched over the Long Bridge into Washington D.C. and crossed the Potomac River into Maryland. They made camp at Unionville by 7:00 P.M., covering fifteen miles for the day.1
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), 27.