Eglin Air Force Base is a United States Air Force base in the western Florida Panhandle, located about three miles southwest of Valparaiso in Okaloosa County. The host unit at Eglin is the 96th Test Wing. The 96 TW is the test and evaluation center for Air Force air-delivered weapons, navigation and guidance systems, command and control systems, and Air Force Special Operations Command systems. Eglin AFB was established 89 years ago in 1935 as the Valparaiso Bombing and Gunnery Base.