23rd ADC (SAGE)

• Full Name: The 23rd Air Division (ADC) was a United States Air Force organization responsible for air defense, primarily under the Aerospace Defense Command (ADC). • SAGE System: The 23rd Air Division was a key participant in the Semi-Automatic Ground Environment (SAGE) system, a massive computer network designed to detect and intercept enemy bombers during the Cold War. • Activation: The division was activated on 19 November 1969, inheriting the mission, personnel, and equipment of the 29th Air Division. • Headquarters: Its headquarters was located at Duluth International Airport, Minnesota, making the division crucial for air defense of the Upper Midwest and northern Great Lakes regions. • Geographical Coverage: The 23rd's area of responsibility covered vast portions of the northern United States, including states such as Minnesota, Wisconsin, North Dakota, South Dakota, and parts of Michigan and Montana. • Aircraft Operated: Units under the 23rd operated several notable aircraft, including the F-101 Voodoo, F-102 Delta Dagger, and F-106 Delta Dart interceptors. • Radar Stations: The division managed a network of radar stations and interceptor bases, integrating them through the SAGE system for rapid response to potential Soviet bomber threats. • Transition to NORAD: In the 1970s, as the threat of manned bombers diminished, the division’s mission shifted toward supporting the North American Aerospace Defense Command (NORAD), including monitoring for missile threats. • Notable Incident: On 23 November 1979, the division was involved in a false alarm incident when a NORAD computer glitch indicated a massive incoming Soviet missile attack, leading to heightened alert before the error was discovered. • Inactivation: The 23rd Air Division was inactivated on 1 July 1987 as the Cold War threat declined and U.S. air defense was reorganized, ending nearly two decades of continuous service.