The United States Air Force's 119th Command and Control Squadron (119 CACS) is a space control unit located at McGhee Tyson ANGB, Tennessee. The unit augments the operations of USSTRATCOM on a continuous basis.

The 119th Command and Control Squadron was one of the first Air National Guard units to become a part of the United States Space Command (later United States Strategic Command) (USSTRATCOM). Its mission is augmentation for USSTRATCOM's global operations center which coordinates and directs the use of the Department of Defense’s military space forces.^{[citation needed]}

The 119th provides support to Headquarters USSTRATCOM via three primary Command and Control mission areas: Global Operations, Homeland Defense Operations, and Natural Disaster Events.

The 119 was originally activated as 119th Tactical Control Squadron in 1965, replacing the 119th Aircraft Control and Warning Squadron, which was established in 1949. Since its inception, the 119 ACS had always operated tactical (mobile) radar systems, but was slated to lose its mission and association with Air Combat Command. This provided a fortuitous opportunity for the unit to be associated with USSPACECOM as a direct supporting unit. In the mid-1990s, USSPACECOM commander Gen Howard Estes III directed the command to expand the role of guard and reserve forces in operations from two percent to 20 percent.

 This article incorporates public domain material from the Air Force Historical Research Agency