 Its mission was to conduct occupational health surveys and investigations within the Department of Defense industrial production base, a mission that proved beneficial to the nation's war effort.In October 1945, AIHL was transferred to what is now Aberdeen Proving Ground - South.From 1940 to 1960, AIHL's mission and personnel continued to expand, and AIHL became the U.S. Army Environmental Hygiene Agency (USAEHA) located at Edgewood Arsenal which was later merged with Aberdeen Proving Ground.