Bombing of São Paulo
The bombing of São Paulo, which took place during the São Paulo Revolt of 1924, was the largest artillery and air attack in São Paulo's history. From 5 to 28 July 1924, rebel and loyalist forces used bombing in their fight for the city; the rebels had up to 26 artillery pieces from the Brazilian Army, while the loyalists had more than a hundred guns and six bombers from the Army Aviation.