Hunter, Alfred M. was born on January 21, 1864 in in Illinois. Son of Nelson F. and Elizabeth (Williamson) Hunter.
Graduated from the United States Military Academy, 1887, graduate Artillery School, 1896, Army War College, 1909.
Commissioned Second lieutenant 5th Cavalry, June 12, 1887. Translations to 4th Artillery, April 3, 1888. First lieutenant 1st Artillery, March 22, 1894.
Promoted through grades to colonel Coast Artillery Corps, August 25, 1915. With siege train 5th Army Corps, campaign against Santiago, Cuba, 1898. Commanded Fort Mott, New Jersey, 1899-1901.
Observer for Board of Ordnance and Fortification, at Sandy Hook, New Jersey, and Fort Riley, Kansas, 1901-1902. Commander Fort Fremont, South Carolina., 1903-1904, Fort Rodman, Massachusetts, 1906-1907, Fort Constitution, N.H., and Artillery District of Portsmouth, 1907-1908, Army War College, 1908-1909, Fort Mott, New Jersey, 1909-1910. Duty headquarters Department of the Gulf and headquarters Eastern Department, 1910-1914.
Fort Winfield Scott, California, 1914-1916. Commanding coast defense of Oahu, Honolulu, 1916-1917. Commanded S. Pacific Coast Artillery District, San Francisco, September 1917-January 1919.