In honor of this great holiday, here are some facts and pictures illustrating the history of dentistry in the military. The first dental standard: soldiers must have enough teeth to bite off the end of the cartridge so that the gun could be loaded. This dental standard lasted until World War II. In 1911, the U.S. Army Dental Corps is established. This is the first armed services dental corps in the United States. John Sayre Marshall, M.D. is considered the father of the U.S.