Lieutenant General Pedro Augusto del Valle (1893–1978), as a colonel was the commanding officer of the 11th Marine Regiment (artillery). Upon the outbreak of World War II, del Valle led his regiment during the seizure and defense of Guadalcanal, providing artillery support for the 1st Marine Division. In the Battle of the Tenaru, the firepower provided by del Valle's artillery units killed many assaulting Japanese soldiers—almost to the last man—before they reached the Marine positions. As a result of the outcome of the battle Japanese commander, Colonel Ichiki Kiyonao, committed seppuku shortly afterwards. General Alexander Vandegrift, impressed with del Valle's leadership, recommended his promotion and on October 1, 1942, del Valle became a brigadier general. Vandegrift retained del Valle as head of the 11th Marines, the only time that the 11th Marines has ever had a general as their commanding officer. In 1943, he served as Commander of Marine Forces overseeing Guadalcanal, Tulagi, and the Russell and Florida Islands.