In October 1936, the Nationalists began a heavy artillery and aerial bombardment campaign on Madrid using German Junker52 aircraft. The Nationalist advance was halted by Republican resistance at the Casa de Campo park
Republican Resistance in Madrid, 1936:
The first shipment of military aid from the USSR arrived, including T-26 tanks and superior-quality aeroplanes, which outmatched the German and Italian aircraft at this stage of the conflict
Militias supported Republican troops
The first detachment of internationalbrigades arrived, boosting Republican morale
