On 5 June 1917, Frederick Christian Marx registered for the World War I draft, giving his full name as Frederick Christian Marx; age 24; residing at 2814 Madison, Balto, Md; born 5 July 1892; has declared intention to become a citizen; born in Hamburg, Germany; machinist for Southern Can Company at Foole[?] Wolfe; dependents include wife and child; married; Caucasian; no prior military experience; medium height, medium build; brown eyes, brown hair, not bald; disability in right foot. [World War I Draft Registration Cards, Roll 1665873.]