Military Collegium of the Supreme Court of the USSR
Genden was "invited" to the USSR, ostensibly for medical treatment, in April 1936. He then spent a whole year at the Black Sea resort town of Foros. In summer 1937, he was arrested as part of Stalin's Great Purge and under interrogation admitted to conspiring with "lamaist reactionaries" and "Japanese spies" He was executed in Moscow on November 26, 1937 by the order of Military Collegium of the Supreme Court of the USSR for 'his attempt to political coup and being a spy of Japan'.