 Even the 1917 Bolshevik Revolution did nothing to slow migration; in fact, after the repression of the 1919 March 1st Movement in Japanese-colonised Korea, migration actually intensified.Korean leaders in Vladivostok's Sinhanchon (literally, "New Korean Village") neighbourhood also provided support to the independence movement, making it a centre for nationalist activities, including arms supply; the Japanese attacked it on April 4, 1920, leaving hundreds dead.By 1923, the Korean population in the Soviet Union had grown to 106,817.