Question: The 831st Air Division of the US Air Force was last assigned at which base located in California?

Context paragraphs:
688th Aircraft Control and Warning Squadron: The 688th Aircraft Control and Warning Squadron is an inactive United States Air Force unit.  It was last assigned to the 31st Air Division, Aerospace Defense Command, stationed at Amarillo Air Force Base, Texas.  It was inactivated on 8 September 1968.

26th Tactical Missile Squadron: The 26th Tactical Missile Squadron is an inactive United States Air Force unit.  It was last assigned to the 21st Air Division, Aerospace Defense Command, stationed near Otis Air Force Base, Massachusetts.  It was inactivated on 30 April 1972.

746th Aircraft Control and Warning Squadron: The 746th Aircraft Control and Warning Squadron is an inactive United States Air Force unit.  It was last assigned to the 31st Air Division, Aerospace Defense Command, stationed at Oklahoma City Air Force Station, Oklahoma.  It was inactivated on 8 September 1968.

George G. Finch: Maj. Gen. George G. Finch became the Senior Leader of the US Air National Guard; (Chief of the Air Division National Guard Bureau) (1948-1950) In June 1953 it was reported that Gen. Mark W. Clark would retire and be replaced by Maj. Gen George G. Finch on the UN command delegation to the Korean armistice talks George G. Finch, born April 11, 1902 in Dade City, Florida, is considered one of the pioneers in United States aviation history.  He began his military career during World War 1, enlisting in the Aviation Section of the Army's Signal Corps in 1918.  He remained in the Reserve Corps after the war, and in 1926, became Commander, 27th Pursuit Squadron, 1st Pursuit Group.  In 1940, Georgia Governor Ed Rivers commissioned him to form the first flying unit of the Georgia Air National Guard.  The unit was mobilized into the U.S. Army in September, 1941, with Major Finch as commander.  After World War II, he was a leading critic of efforts to eliminate the air arm of the National Guard during peacetime.  General Finch gained the respect and admiration of Air National Guardsmen throughout the nation with his steadfast support and successful efforts to preserve the Air Guard.  He became the first Chief of the Air Force Division of the National Guard Bureau in 1948.  Under his leadership, the Air National Guard built to combat readiness and was among the first components called into service after the outbreak of the Korean War.  As a result of General Finch's vision and perseverance, 45,000 highly trained officers and airmen of 22 wings and 65 squadrons gave the Air Force the strength it needed in the early, critical phases of the Communist drive down the Korean peninsula.General Finch served as the senior Air Force member of the United Nations negotiating team at the peace talks at Panmunjom, Korea, and received the Legion of Merit for outstanding service in 1955; General Finch assumed command of Fourteenth Air Force, Robins AFB, Georgia, becoming the nation's first Air National Guardsman to head a numbered air force.  General Finch had a career of "firsts" including the US Army's first night landing with a single, five-million-candlepower floodlight in 1927.  He also established and endowed the General John P. McConnell Award at the United States Air Force Academy.  Considered by many as the father of the strong, independent Air National Guard existing today, General Finch retired in 1957.  No man has had greater impact on the Air Force Reserve and National Guard than has General George G. Finch.A graduate of the University of Georgia and a member of the Georgia Bar, General Finch was enshrined in the Georgia Aviation Hall of Fame May 18, 1996.

741st Aircraft Control and Warning Squadron: The 741st Aircraft Control and Warning Squadron is an inactive United States Air Force unit.  It was last assigned to the 31st Air Division, Aerospace Defense Command, stationed at Lackland Air Force Base, Texas.  It was inactivated on 31 December 1969.

745th Aircraft Control and Warning Squadron: The 745th Aircraft Control and Warning Squadron is an inactive United States Air Force unit.  It was last assigned to the 31st Air Division, Air Defense Command, stationed at Perrin Air Force Station, Texas.  It was discontinued on 30 September 1969.

George Air Force Base: George Air Force Base is a former United States Air Force base located within the city limits, 8 miles northwest, of central Victorville, California, about 75 miles northeast of Los Angeles, California.

456th Bombardment Wing: The 456th Bombardment Wing is an inactive United States Air Force unit.  It was last assigned to the 14th Air Division of Strategic Air Command at Beale Air Force Base, California, where it was inactivated on 30 September 1975.  The wing's predecessor was the 456th Bombardment Group, a World War II United States Army Air Forces combat organization that flew from Italy while assigned to Fifteenth Air Force.  It earned two Distinguished Unit Citations for valor in combat and participated in the strategic bombing campaign against oil production targets including those near Ploiești, Romania, attacks that resulted in high bomber losses.  The group also served as a troop carrier unit in the Air Force Reserve from 1947 to 1949 and as the flying element of the wing from 1952 to 1955.

421st Air Refueling Squadron: The 421st Air Refueling Squadron is an inactive United States Air Force unit.  It was last assigned to the 41st Air Division at Yokota Air Base, Japan, where it was inactivated on 18 February 1965.

831st Air Division: The 831st Air Division is an inactive United States Air Force organization.  Its last assignment was with Tactical Air Command, assigned to Twelfth Air Force at George Air Force Base, California, where it was inactivated on 31 March 1991.

Supporting paragraphs: 831st Air Division George Air Force Base
Answer: George Air Force Base