Camp Mabry (ICAO: KATT) is a military installation in Austin, Texas that houses the headquarters of the Texas Military Forces and the Texas Military Forces Museum. Established in 1892, Camp Mabry is the third-oldest active military installation in Texas, behind Fort Sam Houston and Fort Bliss. It was named for Brigadier General Woodford H. Mabry, the Adjutant General of Texas when the camp was founded. The camp was added to the National Register of Historic Places in 1996.