Camp Greenleaf was a medical officer training camp created at Chickamauga National Battlefield Park as part of Fort Oglethorpe during World War I, under a program that utilized national park and battlefield land for military training installations.  Camp Greenleaf was authorized in May 1917 and began training the next month to prepare medical officers for work with motor field units, mule-drawn units, evacuation hospitals and base hospitals, additionally including veterinary and dental training.  In only 18 months of operation, being decommissioned in December 1918, Camp Greenleaf trained 6,640 officers and 31,138 enlisted men.