On this day in 1915, Typhoid Mary, the first healthy carrier of the disease ever identified in the United States, was put in quarantine, where she would remain for the rest of her life.
On this day in 1938, during the Second Sino-Japanese War, the Battle of Taierzhuang began, resulting several weeks later in the war's first major Chinese victory over Japan.
On this day in 1981, the Solidarity movement in Poland staged a warning strike, in which at least 12 million Poles walked off their jobs for four hours.
And on this day in 1998, the Food and Drug Administration approved Viagra for use as a treatment for male impotence, the first pill to be approved for this condition in the United States.