World War II: The Battle of Hürtgen Forest begins. It will become the second-longest individual battle that the U.S. Army has ever fought.

The Battle of Hürtgen Forest was a series of battles fought from 19 September to 16 December 1944, between American and German forces on the Western Front during World War II, in the Hürtgen Forest, a 140 km² (54 sq mi) area about 5 km (3.1 mi) east of the Belgian–German border. Lasting 88 days, it was the longest battle on German ground during World War II and it is the second longest single battle the U.S. Army has ever fought after the four-day-longer Battle of Bataan.

September 19 is the 262nd day of the year in the Gregorian calendar; 103 days remain until the end of the year.