Grigory Semyonov

Grigory Mikhaylovich Semyonov, or Semenov, was a Japanese-supported leader of the White movement in Transbaikal and beyond from December 1917 to November 1920, a lieutenant general, and the ataman of Baikal Cossacks (1919). He was the commander of the Far Eastern Army during the Russian Civil War. He was also a prominent figure in the White Terror. U.S. Army intelligence estimated that he was responsible for executing 30,000 people in one year.