On May 12, 1940, the Japanese Army carried out the "Operation Agreement No. 101" airstrike at Chongqing. Under the continuous bombardment of the Japanese aircraft, Chongqing's old city was burned almost entirely by the fire on May 12, 1940 to May 30, the Japanese Army bombed Chongqing 13 times a day, launched 608 aircraft, and fired 419 tons. At the beginning of the month, the Japanese Army General's Chongqing Camp commanded the "United Air Forces" from today. After receiving this instruction, the Chinese Army immediately ordered the Third Flight Group to cooperate with the Navy to bomb Chongqing 13 times a day. In order to concentrate the bombardment of Chongqing and other cities, the Japanese Navy