During the Civil War, Brush enlisted in the First New York Artillery in 1863 and served as a private in Company K. After the war's end, he went into business running clothing stores in Albany, Troy and Lockport, New York.
During the Civil War, Brush enlisted in the First New York Artillery in 1863 and served as a private in Company K. After the war ended, he started a career in retail by opening clothing stores in Albany, Troy, and Lockport, New York.