Part I City of Barcelona. Port, city streets. Monument to H. Columbus. Buildings destroyed by bombing. Barricades, workers' patrol. Buildings of hotels "Colon", "Ritz". Volunteers at military exercises. II, III parts. Trucks with soldiers of the people's militia, machine gunners and artillery go to the front through the streets of Barcelona. Local residents welcome the passing soldiers. Fighting artillery, infantry and machine gunners in the area of Samosierra and Sierra de Guadarrama. Grain harvesting; fighters of the people's militia are guarding the field. Front-line hospital tent. A nurse is leading a wounded man. The fighters are getting lunch. City of Toledo. Military hospital at the Amurrio Palace. Fascist planes in the air. Explosion of an aerial bomb. Buildings destroyed after the bombing. Fortress "Alcazar". Funeral of Colonel Puig in Madrid. Seeing the soldiers of the people's militia to the front. A female detachment of fighters of the Republican army on a city street. Local residents welcomed military units going to the front.