My grand father Otto Ahrenberg service #1041769 enlisted in 1915 and served until 1920 His service record shows he was with the Baty F 14th F.A. He died when I was very young and nobody in the family remembers where he was stationed. My dad was born after his service. There is some speculation he might have been involved in the mexico border wars? He is listed as a Sgt when he got out. I served in Vietnam with the 1st of the 1st Cavalry 1st armor div 68 69. If any of you historians can or will search this for me I will be eternally grateful