sentences:  Following World War II, the United States biological warfare program progressed into an effective, military-driven research and production program, covered in controversy and secrecy.Production of U.S. biological warfare agents went from "factory-level to laboratory-level".By 1950 the principal U.S. bio-weapons facility was located at Camp Detrick in Maryland under the auspices of the Research and Engineering Division of the U.S. Army Chemical Corps.