This Day in History for March 12

1912 - Juliette Gordon Low founded the Girl Guides, which later became the Girl Scouts of America.

1664 - New Jersey became a British colony as King Charles the Second granted land in the New World to his brother James, the Duke of York.

1925 - Chinese revolutionary leader Sun Yat-sen died.

1930 - Indian political and spiritual leader Mohandas K. Gandhi began a 200-mile march to protest a British tax on salt.

1933 - President Roosevelt delivered the first of his radio "fireside chats," telling Americans what was being done to deal with the nation's economic crisis.

1938 - the "Anschluss" took place as German troops entered Austria.

1939 - Pope Pius the 12th was formally crowned in ceremonies at the Vatican.

1940 - Finland and the Soviet Union concluded an armistice during World War Two. (Fighting between the two countries flared again the following year.)

1947 - President Truman established what became known as the "Truman Doctrine" to help Greece and Turkey resist Communism.

1969 - Paul McCartney married Linda Eastman in London.

1980 - a Chicago jury found John Wayne Gacy Junior guilty of the murders of 33 men and boys. (The next day, Gacy was sentenced to death; after years on death row, he was finally executed in May 1994.)