Eighty-four years ago today, on August 14, 1941 (June 22, 1941), the Japanese army launched a large-scale "sweep" of the Jinchaji Border Area. On August 14, 1941, the Japanese army attacked the Jinchaji Anti-Japanese Base Area. The Japanese army concentrated the 26th and 41st divisions and the independent mixed third, fourth, and ninth brigades, each with a total of about 20,000 people, and carried out "sweep" to the Jinchaji Anti-Japanese Base Area in multiple ways. The Japanese army successively captured the main points from Shangzhai to Niangziguan on the Great Wall line of the border between Jincha and Cha provinces, and divided the border area; another force was feigned to the seventh division of Jizhong. On the 23rd, the 21st, 33rd, and 110th divisions of the Japanese army that carried out the feint task suddenly changed the direction of attack and besieged the First and Fourth Military Divisions of the Eighth Route Army in Beiyue District and the Jirecha Advancing Army in Pingxi in multiple directions along Fangshan, Baoding, Shijiazhuang, Jingxing and other places. In order to avoid the sharp edge of the Japanese army and take the initiative, the Eighth Route Army persisted in the struggle on the internal line with one force, killing, consuming and delaying the Japanese army in large quantities, covering the transfer of the main force. Under the cover of the internal combat forces, the sub-division organs and the main force grabbed the favorable fighter jets and transferred them to the outside to fight one after another. On the 31st, the Japanese puppet army, in addition to a force to encircle the Eighth Route Army in the Pingxi area, concentrated the main force about 20,000 people to carry out a fierce attack in the direction