The President of the United States of America, authorized by Act of Congress, July 9, 1918, takes pride in presenting the Distinguished Service Cross (Posthumously) to First Lieutenant (Infantry) Louis B. Jansen, United States Army, for extraordinary heroism in action while serving with 361st Infantry Regiment, 91st Division, American Expeditionary Forces, near Epinonville, France, 26 September 1918. When the advance of his battalion was held up by an enemy machine-gun nest, Lieutenant Jansen, accompanied by a soldier, crossed the enemy wire, took the position, killed one of the enemy and captured four prisoners and two machine-guns.