Arthur R. Wilson was born on July 18, 1894, in
Cherokee, California, as the son of Alexander Moffatt and Agnes Matilda Wilson. He attended grammar school in Cherokee and subsequently enrolled at
Oroville Union High School. Following the graduation in summer 1913, Wilson entered the
University of California at Berkeley and also enlisted the
California National Guard. Wilson rose through the ranks from Private to Sergeant and left the University in June 1916, when his regiment was called for the federal service during
Pancho Villa Expedition. He was ordered to the Mexican Border with 2nd California National Guard Infantry Regiment and was promoted to the rank of Quartermaster Sergeant. Wilson's unit was deactivated by the end of September 1916 and he returned to the civilian life. Following the
American entry into World War I in April 1917, Wilson entered the Army service and was commissioned as a
second lieutenant in the
Field Artillery Branch on August 15, 1917. He was ordered to the
Presidio of San Francisco and attached to the 386th Field Artillery Regiment. Wilson completed basic training and moved with the regiment to
Camp Lewis,
Washington, D.C., in September 1917. He was promoted to the temporary rank of
first lieutenant on April 11, 1918, and embarked for
France in June that year. He was meanwhile promoted to the temporary rank of
captain on May 24, 1918, and was stationed at Camp de Souge, where he participated in the training of replacement units. Upon the signing of the
Armistice with Germany in November 1918, he participated in the
occupation of the Rhineland,
Germany until February 1919, when his regiment was ordered back to the United States. ==Interwar period==