 Complete the following phrase:  At the beginning of the Spanish Civil War, on 17 July, he participated in the capture of the Civil Guard barracks in La Felguera. Two days later he marched at the head of 400 anarcho-syndicalists towards Gijón, where he had a prominent role in the Siege of Gijón, participating in the taking of Simancas barracks and El Coto. After the capture of the headquarters of the Simancas regiment, a massacre took place, which Carrocera tried to prevent without success. Later he directed the military operations during the 