Served during the Spanish American War; enlisted May 3, 1898; was a wagoner, and was in the Battle of El Caney, July 1, 1898; under fire at San Juan Hill, July 2, 1898, and at the surrender of Santiago, July 11, 1898. When General Ludlow's horse was shot from under him, young Stewart was sent to take the saddle and equipments from the animal. He died in Greenfield, Mass., Sept. 23, 1899, from the effects of hard service in Cuba (Severance, B. Frank. Genealogy and biography of the descendants of Walter Stewart of Scotland and of John Stewart who came to America in 1718 and settled in Londonderry, N.H. Greenfield, Mass. : T. Morey & Son, 1905, pg. 157-158).