A film about the tactical exercises of the Red Army in 1940. Infantry, artillery, air force, tank, motorized units of the Red Army in tactical exercises. Among the commanders - Marshal S. K. Timoshenko. Chronicle: Lake Hasan. Sopka Zaozernaya. Landscapes. Border Patrol. Mannerheim Line. Destroyed fortifications. Destruction, the ruins of one of the cities. Border post. Sentinel on duty. Drafting into the army: conscripts at recruiting stations, seeing conscripts into the army. Soldiers take the oath. Parade on Red Square in Moscow. SK Timoshenko takes the parade. On the podium of the Mausoleum: MI Kalinin, IV Stalin, VM Molotov, KE Voroshilov and others.