Sun Yat Sen was instrumental in the execution of the Xinhai Revolution, which ultimately overthrew the Qing Dynasty, the last dynasty of Imperial China.
Sen was a founding member of Xingzhoughui, or Revive China Society, which was established in 1894 in Honalulu. Sen’s society would be an important source of financial support of the revolutionaries. He merged his group with another group, the Furen Literary Society in 1894.
Sen also tried to overthrown the government in 1895. This attempt was known as the First Guangzhou Uprising, but resulted in failure and Sen’s exile to Japan. A later attempt in Huizhou also ended in failure.
Sen’s most important contributions was the Tongmendhui, or Three Principals of the People. These three principals formed the basis for post-imperial government when the Qing were finally overthrown. This ideology was claimed by both Chaing Kai Shek and Mao Zedong, who differed on their meaning but used them to shape their own visions. These principals also inspired Vietnam during their own war of independence from the French and U.S.