Following service in the Philippines, the 6th returned to the Presidio of San Francisco, California. In May 1914, it entered into service on the Mexican border. In March 1916, it proceeded to San Antonio, Chihuahua, as part of the Punitive Expedition under Brigadier General John J. Pershing. In February 1917, Pershing's force withdrew from Mexico and the regiment moved to Fort Bliss. Because of their action, the regiment was awarded another campaign streamer – MEXICO 1916–1917.