Titan IIIC | TACSAT 1

TACSAT 1 (also TACOMSAT, Tactical Communications satellite) was the largest and most powerful communications satellite at the time when it was launched into synchronous orbit by a Titan-3C booster 9 February 1969, from Cape Canaveral, Florida. The experimental tactical communications satellite was designed and built by Hughes Aircraft Company, under the direction of the U.S. Air Force Space and Missile Systems Organization, for the Department of Defense.

The Titan IIIC was an expendable launch system used by the United States Air Force from 1965 until 1982. It was the first Titan booster to feature large solid rocket motors and was planned to be used as a launcher for the Dyna-Soar, though the spaceplane was cancelled before it could fly. The majority of the launcher's payloads were DoD satellites, for military communications and early warning, though one flight (ATS-6) was performed by NASA. The Titan IIIC was launched exclusively from Cape Canaveral while its sibling, the Titan IIID, was launched only from Vandenberg AFB.

The United States Air Force (USAF) is the air service branch of the United States Armed Forces, and is one of the eight uniformed services of the United States. Originally created on 1 August 1907, as a part of the United States Army Signal Corps, the USAF was established as a separate branch of the United States Armed Forces in 1947 with the enactment of the National Security Act of 1947.