Military Collegium of the Supreme Court of the USSR
The trial, with 16 defendants, was held from August 19 to August 24, 1936 in the small October Hall of the House of the Unions (chosen instead of the larger Hall of Columns, used for earlier trials). The defendants were tried by the Military Collegium of the Supreme Court of the USSR, with Vasili Ulrikh presiding. The Prosecutor General was Andrei Vyshinsky, a former member of the Mensheviks who in 1917 had signed an order to arrest Lenin.