The Civil War had a significant impact on Rockland County, New York. The county's population had doubled to 22,492 by 1860. Several Rockland County companies served, including units from Nyack, Stony Point, Haverstraw, Ramapo, and Clarkstown. Brothers from one family all served in the 17th New York Infantry. The county also saw recruiting of Irish immigrants and Germans led by General Louis Blenker. The draft impacted Rockland County as well. Sites like Mount Moor Cemetery honor those who fought from the area.