On this day, 74 years ago, September 29, 1951 (August 29, 1951 in the lunar calendar), the autumn defensive campaign began. Bloody battle on Tiande Mountain. Soldiers of the 5th Company of the 422nd Regiment of the 141st Division of the 47th Army of the Chinese People's Volunteers in Tiande On September 29, 1951, the autumn defensive campaign began. After the summer offensive was shattered, the "United Nations Army" quickly launched the "Autumn Offensive" against the Chinese and North Korean troops on September 29. The focus of the attack started on the western line of Lianchuan and the west of Tieyuan, and later turned to the east and west of the Beihan River on the eastern line, which were all positions defended by the volunteers. On that day, the "United Nations Army" adopted the tactics of "attacking section by section and advancing gradually". First, three divisions of the United States and British troops launched a tentative attack on the Western Front, in an attempt to force the Chinese and North Korean troops to abandon the front line from the left bank of the Imjin River to the west of Tieyuan. Position, and threatened Kaesong from the flank. Focusing on Yeyue Mountain, the U.S. 3rd Division first attacked Yeyue Mountain, Tiande Mountain to Damali, the position of the 47th Army of the China People's Volunteer Army. In the autumn offensive, six divisions of the United States and British forces and three divisions of the South Korean army were mobilized. Comment: After twenty-four days of fierce fighting, the "Autumn Offensive" was shattered on October 22, and the Chinese and Korean troops wiped out more than 79,000 enemies.