Group of 21 Juvenile Adventure Novels Related to the Military and Armed Forces. Including six titles from The Submarine Boys Series by Victor G. Durham (Philadelphia: Henry Altemus Co., 1909 ? 1912); ten titles from The Boy Allies with the Army Series by Clair W. Hayes and Robert L. Drake (New York: A.L. Burt, 1915 ? 1918); two volumes by James Otis, With the Regulators (New York: A.L. Burt, 1901) and The Minute Boys of Yorktown (Boston: Dana Estes Co., 1912); and others. Publisher?s pictorial cloth-backed boards. Frontispieces. 8vos. Conditions vary, generally good to very good.