Not related, but have info you seek- it is very brief. Could not find WW1 draft card reg. for him unfortunately. Also include 1930 census on your line in case you don't have it. All I could find, but a start for you. Perhaps someone else can add to it. Good luck with your searches.
1910 Federal Census US Fort Walla Walla, Walla Walla, WA ECKMAN, Rubie H., 28, MO, private
1930 Federal Census US Clark Rd., Gary, Lake County, IN SCHUDT (?), Henry P., 28, marr. 23, GER GER GER, imm 1910, signal maintainence, railroad Hattie, 26, marr 21, MO WI WI ECKMAN, Gladys, 17, step-dau, IL ", Austin, 14, step-son, IA