, that were used in bombing of Nagaoka in 1945. Exhibit at
Niigata Prefectural Museum of History. Nagaoka was attacked for the first time on 26 July 1945. The city was one of ten to be attacked during late July by the United States Army Air Forces'
509th Composite Group to practice the tactics the unit later used to conduct the
atomic bombings of Hiroshima and Nagasaki. These raids were conducted by small groups of two to six
Boeing B-29 Superfortress bombers armed with
Pumpkin bombs. The 509th Composite Group assessed the results of the small attack on Nagaoka as having been "fair". During the night of 27/28 July B-29s dropped leaflets on Nagaoka and ten other cities which stated that they would be subjected to attack, and that civilians
should evacuate ahead of the raids. This tactic sought to intensify the psychological effects of the bombing campaign. The main raid on Nagaoka occurred on 1 August 1945. Commencing at around 10:30 p.m. that night, 125 B-29 Superfortress bombers from the
313th Bombardment Wing struck the city with an estimated 163,000 incendiary bombs totaling 925 tons. The raid lasted for 1 hour and 40 minutes. ==Legacy==