sentences:  Beginning in 1972, the Soviet Union, United States and more than 100 other countries signed the BWC.The United States ratified the Geneva Protocol in 1975.When the U.S. biological warfare program ended in 1969 it had developed six mass-produced, battle-ready biological weapons in the form of agents that cause anthrax, tularemia, brucellosis, Q-fever, VEE, and botulism.