Grissom Air Reserve Base is a United States Air Force base, located about north of Kokomo in Cass and Miami counties in Indiana. The facility was established as a U.S. Navy installation, Naval Air Station Bunker Hill, in 1942 and was an active Air Force installation, Bunker Hill Air Force Base from 1954 to 1968, and Grissom Air Force Base from 1968 to 1994. Pursuant to a BRAC 1991 decision, the installation was downsized to an Air Force Reserve installation and renamed Grissom Air Reserve Base.