 In 1918, even though he had on April 5, 1917, voted against declaring war on Germany, he absented himself from the Congress and enlisted in the United States Army to fight in World War I.He served in the 313th Infantry Regiment as a private, sergeant, second lieutenant, and first lieutenant.In Montfaucon, France, on the 26th and 27 September 1918, he was involved in a combat situation wherein he repeatedly exposed himself to enemy fire and was wounded by an exploding shell.