Following the suppression of the rebellion, Moses returned to the United States in November 1912 and assumed duty at Marine Barracks, Puget Sound Navy Yard, Washington. While in this capacity, he was promoted to captain on July 12, 1914, and assumed command of the Marine detachment aboard the cruiser USS "Galveston". He took part in the support operations during the Veracruz Expedition in fall 1914 and then sailed for Guam. Captain Moses participated with "Galveston" in the convoy duty between the Philippines and Guam until June 1916, when he was ordered back to the United States.