Biological Weapons 1346 Plague-ridden bodies used by Tartar army against Kaffa 。1925 Plaque-carrying flea bombs used in the Sino-Japanese War ● 1950s U.S.Army spraying of S.marcescens to test weapons dispersal 。1972 International agreement to not possess biological weapons 。1979 B.anthracis weapons plant explosion in the Soviet Union 1984 S.enterica used against the people of The Dalles 。2001 B.anthracis distributed in the U.S.• 1346 Plague-ridden bodies used by Tartar army against Kaffa • 1925 Plaque-carrying flea bombs used in the Sino-Japanese War • 1950s U.S. Army spraying of S. marcescens to test weapons dispersal • 1972 International agreement to not possess biological weapons • 1979 B. anthracis weapons plant explosion in the Soviet Union • 1984 S. enterica used against the people of The Dalles • 2001 B. anthracis distributed in the U.S. Biological Weapons