Many rebellions began on February 9.
On this day in 1775: Hostilities between Britain and the American colony of Massachusetts become imminent as the British Parliament announced the state was in rebellion and approved new laws to control the situation.
On this day in 1899: The Boxer Uprising broke out in China. It was sparked by popular discontent with misgovernment and anti-foreign sentiment aroused by unequal treaties. They boxers laid siege to the foreign legion in Peking, where a combined force of Japanese, French, British, Russians, and American troops held out for over a month.
On this day in 1921, the Living Buddha of Outer Mongolia proclaimed "independence" after Mongolian and Russian communists gained control of Outer Mongolia. They established the Mongolian People's Republic in 1924, after the Living Buddha died.
On this day in 1962, the Taiwan Stocks Exchange formally began operations.