May Day demonstration in Moscow: columns of demonstrators march through the streets with placards and banners. Red Army units on Red Square before the start of the parade. People's Commissar of Defense K. E. Voroshilov takes a parade of troops. The leaders of the state on the podium of the Mausoleum welcome the participants of the demonstration and military parade; among them - A. I. Mikoyan, E. Yaroslavsky, A. Yenukidze, N. Bukharin. The Red Army men take the military oath. Troops are in a ceremonial march, military equipment is passing by, columns of demonstrators are passing by.