Complex sentence: Those who resumed their life's as civilians was Colonel José Guadalupe Gallegos who was one of the founding members of the Historical Society of New Mexico and was a founding associate in the incorporation of the New Mexican Railway Company p.110 and the New Mexico Wool Manufacturing Company.
Split into simpler sentences: Those who resumed their life's as civilians was Colonel José Guadalupe Gallegos. He was one of the founding members of the Historical Society of New Mexico and a founding associate in the incorporation of the New Mexican Railway Company p.110 and the New Mexico Wool Manufacturing Company.