Congress delegates arrive at the Grand Kremlin Palace, communicate on the sidelines, and attend meetings. Among the delegates: L. D. Trotsky, M. N. Tukhachevsky, A. I. Rykov, L. A. Fotieva, G. Ya. Sokolnikov, M. I. Kalinin, N. P. Bryukhanov, A. P. Smirnov , V. A. Shelgunov, P. A. Moiseenko, A. S. Martynov, A. Lezhava, N. P. Gorbunov, N. A. Semashko, M. F. Vladimirsky, A. V. Lunacharsky, V.M. Molotov, K.I. Nikolaeva and others.