The first bombardment occurred on July 19, 1943 and was carried out by 500 American bombers which dropped 1,168 tons of bombs. The entire working class district of San Lorenzo was destroyed, and 3,000 Italian civilians were killed in the raids over five residential/railway districts. The military targets were few, the largest Stazione Termini contained a marshaling yard, railways and industries that manufactured steel, textile products and glass.