On 1 September 1939, the city was bombed by the German Luftwaffe in the first action of World War II (apart from the Jabłonków Incident on 25/26 August). In the Bombing of Wieluń, German planes destroyed most of the town centre, including a clearly marked hospital, a synagogue, and the historic Gothic church, and killed at least 127 civilians. According to Norman Davies, the bombings destroyed three-quarters of the town. Thousands were injured and many fled. No Polish military units were present in Wieluń at that time (31 August - 1 September 1939).