sentences:  It became a major center of the defense industry, with PZL Rzeszów opening there in 1937, it also was home to a large garrison of the Polish Army, with the 10th Motorized Cavalry Brigade stationed there.In 1939, Rzeszów had 40,000 inhabitants, but its dynamic growth was stopped by the Invasion of Poland.On 6 September 1939, Rzeszów was bombed by the Luftwaffe.