Joint Base Lewis–McChord (JBLM) is a U.S. military installation in Washington State, located 9 miles south-southwest of Tacoma, Washington, United States. JBLM is an amalgamation of the United States Army's Fort Lewis and the United States Air Force's McChord Air Force Base. The two bases were combined on February 1, 2010. JBLM is a prominent staging point for both combat and humanitarian missions. Fort Lewis is one part, in fact, half of JBLM, along with McChord Air Force Base. Fort Lewis represents the United States Army’s I Corps.