He was also known as "Alexander D. Munson". He entered the US Army in New York, New York. He served as a Private in Company I, 5th US Infantry. He was awarded the CMOH for action between October 21, 1876 and January 8, 1877 at Cedar Creek, etc., Montana. His citation reads "Gallantry in action". He was cremated at the Fresh Pond Crematorium, Middle Village, New York City, New York, and his ashes were retained by his family.