Naval Academy, Annapolis, Maryland, to command the Marine Detachment aboard the battleship USS Indiana.

Barrett landed with the detachment of USS New Jersey at Vera Cruz, Mexico, on 22 April 1914, and participated in the capture of that city.

Barrett's World War I duty included detached service with the United States Army in France from 25 September 1918.

He then returned to France to study at the Ecole de Guerre in Paris, and from 1929 to 1933 served as an instructor at the Marine Corps Basic Schools, Quantico, Virginia.

Later he served as assistant to the Commandant of the Marine Corps, Lieutenant General Thomas Holcomb, from November 1941 to March 1942.

[4] The general fell out of the second floor window of his residence at Nouméa, and the inquest ruled the death accidental, related to a possible cerebral hemorrhage.

[5] The sudden death of General Barrett resulted in Vandegrift's recall to the Pacific to resume command of IMAC.

Returning to the United States in September 1942, to take command of the Third Marine Division, he developed a powerful striking force which was later to blast the enemy from his strongholds on Bougainville, Guam and Iwo Jima and thus pave the way for ultimate victory over the Japanese.

Relieving the Commanding General of the First Marine Amphibious Corps on 15 September 1943, Major General Barrett, from his Headquarters on Noumea, New Caledonia, aided in formulating strategic plans for the assault on Bougainville which was to end enemy opposition to the important development of the Empress Augusta Bay Area as an Allied Airbase and to advance United States control nearer to the shores of the Japanese Homeland.