Organized at Washington, D.C., for the defense of that city April, 1861. Attached to Mansfield's Command, Dept. of Washington, D.C., to June, 1861. Rockville Expedition to July, 1861.
SERVICE.--Duty in the Defenses of Washington, D.C., until June, 1861. Expedition to Rockville, Md., June 10-July 7. Action at Seneca Mills June 17. Great Falls July 7. Mustered out July, 1861.