Forest Glen Annex The Forest Glen Annex is a U . S . Army installation in the Forest Glen neighborhood of Silver Spring , Maryland , USA . It is situated between Brookville Road and Linden Lane . Since 1999 , the Annex has been the site of the Walter Reed Army Institute of Research ( WRAIR ) and the Naval Medical Research Center ( NMRC ) , along with smaller units . In addition to the large research laboratories located in the Annex ’ s " Daniel K . Inouye Building " ( Building 503 ) , the post includes a commissary , post exchange , arts & crafts center , veterinary treatment facility , outdoor recreation resource center and a Fisher House . There are also football , baseball , and picnicing fields . In 2011 , in accordance with the most recent Base Realignment and Closure ( BRAC ) recommendations , the Forest Glen Annex became home to the National Museum of Health and Medicine ( NMHM ) as well as a " Joint Center of Excellence in Infectious Disease Research " . The post exchange has closed and will be the future site of the JPC , or Joint Pathology Center . ( A new PX is under construction at the Walter Reed National Military Medical Center ( WRNMMC ) in nearby Bethesda , scheduled for completion in late 2012 . ) The Forest Glen property was acquired by the Army during the World War II era . Formerly known as the “ Walter Reed Forest Glen Annex ” , after many decades under the tenancy of the Walter Reed Army Medical Center ( WRAMC ) in Washington , DC , authority over the facility was transferred on 1 October 2008 to the Installation Commander , Fort Detrick , Maryland . The Forest Glen Annex campus includes the National Park Seminary Historic District which is being redeveloped separately from the military area . The associated Glen Haven housing area in nearby Wheaton , also now owned by Fort Detrick , has 240 quarters for enlisted soldiers and for officers in grades O - 1 through O - 3 . History . The land on which the Forest Glen Annex now stands was originally part of a huge tract belonging to the influential Carroll family of colonial times , which lived nearby . During the Civil War , the land was owned by Alfred Ray , a southern sympathizer . In July 1864 , Ray allowed the troops of Confederate General Jubal Early to encamp on his land , before sallying down nearby Brookville Road for an unsuccessful raid on Washington , D . C . , which ended in the Battle of Fort Stevens . Ray spent time in a federal prison for his action . During the period 1887 to 1894 , the site was a short - lived hotel and casino , part of an ill - fated land development scheme . A prestigious finishing school , the “ National Park Seminary ” , occupied the site between 1894 and 1936 , after which a women ' s junior college , the “ National Park College ” , was located there between 1937 and 1942 . With U . S . involvement in World War II , the Army ’ s Walter Reed General Hospital needed more space for the convalescence and rehabilitation of returning veterans . Exerting its authority under the War Powers Act , it bought the “ National Park College ” for $ 800 , 000 in 1942 . In addition , the Army bought a much larger area of over to the south of the school – then an operating dairy farm and a former tobacco plantation – which are now the operational portion of the installation . From 1942 through 1977 , the several buildings at the north end of the post housed the “ Walter Reed Army Convalescent Center - Forest Glen Annex ” , where Army providers treated soldiers wounded in Europe , Korea and Vietnam . Services included prosthetics , audiology , speech therapy , physical rehabilitation and a therapeutic art studio . The site was added to the National Register of Historic Places in 1972 . When the last patient was discharged in 1977 , the Army largely abandoned these buildings . In the late 1990s , U . S . Senator Paul Sarbanes directed that funds be used for site stabilization of the old National Park College . In 1999 , the Army began taking formal steps to " excess " the area now known as the " National Park Seminary Historic District . "