Early career In March 1899, Watres joined the
Pennsylvania National Guard's Company K, 11th Infantry Regiment as a
private, and he served until his discharge in November 1899. In October 1907 he joined Company H, 13th Infantry Regiment as a private, and he advanced to
corporal and
sergeant before receiving his commission as a
second lieutenant in July 1908. As a captain, Watres commanded Company C, 13th Infantry Regiment during its service on the
Mexico–United States border as part of the
Pancho Villa Expedition.
World War I At the start of
World War I, Watres commanded Company M,
109th Infantry Regiment, a unit of the
28th Division. He combined the company with soldiers from his own company and led an ad hoc attack that resulted in numerous enemy killed, wounded, and taken prisoner, as well as the capture of several machine gun nests.
Post-war After returning to the United States world war I, Watres took part in reorganizing the 109th Infantry Regiment.
Distinguished Service Cross citation The President of the United States of America, authorized by Act of Congress, July 9, 1918, takes pleasure in presenting the Distinguished Service Cross to Captain (Infantry) Laurence H. Watres, United States Army, for extraordinary heroism in action while serving with 108th Machine-Gun Battalion, 28th Division, A.E.F., near Baslieux, France, 5 September 1918. Under heavy enemy machine-gun fire, Captain Watres took command of Company D, 109th Infantry, which was without officers and was greatly disorganized in a position to his rear. He led the company, together with some of his own men to the attack, killing a number of the enemy, taking others prisoners, and capturing several machine gun nests.
GENERAL ORDERS: War Department, General Orders No. 130 (1919) ==Continued career==