The following excerpt is taken from the New York State Division of Military and Naval Affairs: Military History 7th Regiment, New York State Militia, New York National Guard: 'April 19, 1861, the regiment, commanded by Col. Marshall Lefferts, left the State, en route to Washington, D. C., where it was mustered in the service of the United States for thirty days, April 26, 1861; it served at Washington and was mustered out at New York city, June 3, 1861.' The following excerpt is taken from the Third Annual Report of the Bureau of Military Statistics of the State of New York, Albany: [The Bureau], (C. Wendell), 1866. SEVENTH REGIMENT, N. Y. S. MILITIA: 'News of the riot in Baltimore, in which Massachusetts soldiers were killed, was received before the regiment left New York and increased greatly the interest attending its departure. The Seventh went by railroad to Perrysville; thence by steamer to Annapolis, and along or near the railroad track to Annapolis Junction and Washington, where it served for thirty days. Arrived at Annapolis April 22d, and at Washington the 25th, and was mustered into the United States service April 27th. The regiment crossed the Potomac with the first troops that entered Virginia, when Alexandria and Arlington Heights were occupied, and labored with the New Jersey brigade in the construction of 'Fort Runyon.' The Seventh remained on duty at and in the vicinity of Washington until the 31st of May, when it returned to New York.'