Партия социалистов-революционеров
Boris Viktorovich Savinkov (Russian: Бори́с Ви́кторович Са́винков; 31 January 1879 – 7 May 1925) was a Russian writer and revolutionary. As one of the leaders of the Fighting Organisation of the Socialist Revolutionary Party, he became involved in the assassinations of several high-ranking imperial officials in 1904 and 1905.