As we all know, after the outbreak of the all-out War of Resistance Against Japanese Aggression, the Kuomintang and the Communist Party quickly reached an agreement to stop the civil war and jointly resist Japan, and the Red Army in northern Shaanxi was unified and reorganized into the Eighth Route Army of the National Revolutionary Army, of which the Red Fourth Front Army was the first.
4. The 31st Army and the Red Army of Northern Shaanxi were reorganized into the 129th Division. The 10th and 12th Divisions of the Red Fourth Army were reorganized into the 385 Brigade. The 91st and 93rd Divisions of the 31st Red Army were reorganized into the 386 Brigade, and the Red Army in Northern Shaanxi was reorganized into divisional units. Originally, the division was reduced to a regiment, and the original regiment was reduced to a battalion. In this way, the Red Fourth Front Army was organized into a total of 12 battalions. So, what happened to these 12 battalion commanders?First of all, let's talk about the 769 Regiment, the 769 Regiment can be said to have made great achievements in the Anti-Japanese War, and it is also the best developed unit in the Taihang Base Area. Wu Rongzheng, commander of the first battalion, a native of Tongjiang County, Sichuan, organized a guerrilla force of more than 400 people in his hometown when he was young. After the Red Army of the Fourth Front Army arrived in northern Sichuan, he resolutely led a team to join and served as the battalion commander of the 73rd Regiment of the 25th Division of the Red Ninth Army. During the War of Resistance Against Japanese Aggression, Wu Rongzheng was appointed as the commander of the first battalion of the 769 Regiment, transferred to Jinji, and in the battle of Lao Yeling, he led the team to engage in hand-to-hand combat with the Japanese invaders. During the Liberation War, he was transferred to the Northeast and served as the chief of staff of the 17th Division of the 6th Column of the Dongye Army, and the commander of the 143rd Division of the 48th Army of the Fourth Field Army. After the founding of the People's Republic of China, he served as the commander of the 21st Artillery Division and the commander of the artillery of the Kunming Military Region, and was awarded the rank of major general in 1955. 
Kong Qingde, the commander of the second battalion, is a descendant of the Confucius family and a native of Qufu, Shandong. At the age of 16, he went to the 46th Division of Chen Tiaoyuan's Department as a soldier, and in February 1931, he participated in the Lu'an Mutiny led by the battalion commander Wei Mengxian and others in Lu'an, Anhui Province, and was assigned to the 2nd Division of the Red Army ** in the Hubei-Henan-Anhui Soviet District. After the outbreak of the Anti-Japanese War, he served as the commander of the 2nd Battalion of the 769th Regiment of the 385th Brigade of the 129th Division of the Eighth Route Army, and participated in the night attack on Yangmingbao and Shentouling, Xiangtangpu and other battles. In April 1938, he went south to southern Hebei with the Ludong Column led by *** and others, and served as the second commander of the 769th Regiment and the commander of the Third Army Division of the Southern Hebei Military Region. After the victory of the Anti-Japanese War, he served as the commander of the 4th Brigade of the 2nd Column of the Shanxi-Hebei-Shandong-Henan Field Army and the deputy commander of the 10th Column. After the founding of the People's Republic of China, he served as the commander of the artillery of the Central South Military Region. In 1955, he was awarded the rank of lieutenant general. Zhao Chongde, commander of the third battalion, a native of ** County, Henan, joined the Red Army in 1930 and served as the captain of the special team of the 12th Division of the Red Fourth Army. After the Long March arrived in northern Shaanxi, he served as the battalion commander of the Red Fourth Army, and when the Anti-Japanese War broke out, Zhao Chongde was one of the very few cadres in the Red Army who was not demoted, and changed from the Red Army battalion commander to the commander of the third battalion of the 769th Regiment of the Eighth Route Army. 
The second is the 770th Regiment, the 770th Regiment is special, from 1937 to 1944 it was responsible for guarding the Shaanxi-Gansu-Ningbo Border Region. Bu Wanke, commander of the first battalion of the 770th Regiment, a native of Jinzhai, Anhui, joined the Red Army in August 1930. After the Red Fourth Front Army arrived in northern Shaanxi, he served as the commander of the 34th Regiment of the 12th Division and the 31st Regiment of the 10th Division of the Red Fourth Army. At the outbreak of the Anti-Japanese War, he was transferred to the commander of the first battalion of the 770th Regiment. He led his troops to smash the "Longdong Incident" in which Hu Zongnan deliberately invaded the border area. In the spring of 1941, he served as the deputy commander of the 77th Regiment. In 1944, the 770th Regiment was ordered to go east to western Henan to open up the situation, and Bu Wanke served as the commander of the 10th Regiment of the 4th Detachment of the Henan People's Anti-Japanese Army and the commander of the 2nd Column and 13th Brigade of the Central Plains Military Region. After the outbreak of the Liberation War, he led the 13th Brigade to break through the enemy's encirclement and interception, and successfully arrived in Yan'an. After that, he was ordered to return to the Central Plains Military Region and served as the deputy commander of the Runan Military Division of the Henan-Anhui Soviet Military Region, and participated in the battle of the Huaihai Campaign to block the Huang Wei Corps. After the founding of the People's Republic of China, he served as the commander of the Xinyang Military Division of the Henan Military Region, and was awarded the rank of major general in 1955. Zhang Xuewen, commander of the second battalion, a native of Jinzhai, Anhui Province, joined the Red Army in 1928, worked all the way from squad leader to the commander of the 35th Regiment of the 12th Division of the Red Fourth Army, and was transferred to the commander of the second battalion of the 770 regiment after the outbreak of the Anti-Japanese War, and died of illness in 1942. Guo Yingchun was awarded the rank of colonel in 1955. 
Zhang Defa, commander of the third battalion, a native of Xinxian County, Henan, joined the Red Army in 1928 and successively served as a soldier, squad leader, and regiment commander of the 31st Division of the 11th Red Army, a soldier of the 1st Red Army, and the commander of the Independent Division of the Red Fourth Front Army. During the Anti-Japanese War, he served as the commander of the third battalion of the 770th Regiment, the chief of staff of the regiment, and the commander of the second brigade of the police. After the victory of the Anti-Japanese War, he was transferred to the Northeast and served as the commander of the 30th Brigade, the commander of the 16th Independent Brigade, the commander of the 23rd Division of the Eighth Column of Dongye, and the commander of the 11th Division of the Fourth Column. After the founding of the People's Republic of China, he served as the director of the headquarters of the Xinjiang Production and Construction Corps, and was awarded the rank of colonel in 1955. The third is about the 771st regiment. Xu Qihai, commander of the first battalion of the 771st Regiment, a native of Jinzhai, Anhui Province, joined the Jinzhai County guerrillas at the age of 15, and later the guerrillas were incorporated into the Red Army, and Xu Qihai served as the company commander and instructor and deputy battalion commander of the 218th Regiment of the 73rd Division of the Red 25th Army, and the chief of staff of the 721st Regiment of the 91st Division of the Red 31st Army. In the anti-six-way siege, the 271st Regiment annihilated four regiments of the Sichuan Army overnight, and the number of enemies annihilated was the highest in the whole army, and Xu Qihai was promoted from the chief of staff of the regiment to the chief of staff of the 91st Division because of his merits. At the outbreak of the Anti-Japanese War, Xu Qihai was transferred to the commander of the first battalion of the 771 Regiment, and in 1938, he was transferred to the section chief of the Suide Garrison Command of the Eighth Route Army, and in March 1943, he was appointed as the commander of the special service battalion of the Guanzhong Garrison Command. In 1945, he was ordered to enter the Northeast and served as the commander of the Third Artillery Regiment of the Jireliao Military Region, the head of the Teaching Regiment of the Rehe Military Region, and the chief of staff of the 24th Division of the Eighth Column of the Dongye. In January 1949, he served as the deputy commander of the 158th Division of the 45th Army, and led his troops to join the main attack force at the Haihe Jingang Bridge during the liberation of Tianjin. After the founding of the People's Republic of China, he served as chief of staff of the 45th Army, captain of the teaching brigade, and commander of the 133rd Division of the 45th Army, and was awarded the rank of major general in 1955. 
Zou Guohou, commander of the second battalion of the 771st Regiment, a native of Hong'an, Hubei, participated in the Jute Uprising in 1927 and served as the commander of the 272nd Regiment of the 91st Division of the Red 31st Army in the Red Army. After the outbreak of the Anti-Japanese War, he served as the commander of the second battalion of the 771st Regiment, and the most famous thing is to invent the sparrow warfare, which broke down the strength of the four companies into hundreds of 3 to 5-person combat groups, scattered in the roadside forests, and when the Japanese army approached, they used cold guns, and they ran away, and tossed enough to choke an infantry brigade and a cavalry squadron of the 20th Division of the Japanese army that came to sweep, and were forced to retreat to the starting point, and our army only injured one person. Later, he served as the commander of the 6th Division of the Southern Hebei Military Region and the deputy commander of the new 4th Brigade. During the Liberation War, he served as the commander of the 4th Division of the Hubei-Henan Military Region. After the founding of the People's Republic of China, he served as commander of the Xingtai Military Subdivision of the Hebei Provincial Military Region, deputy commander of the Hebei Provincial Military Region, and vice chairman of the Hebei Provincial Committee of the Chinese People's Political Consultative Conference. In 1955, he was awarded the rank of Major General. Wu Zongxian, commander of the third battalion of the 771st Regiment, a native of Lu'an County, Anhui Province, joined the Red Army in 1932 and worked from platoon commander and company commander to deputy commander of the 276th Regiment of the 91st Division of the 31st Red Army. After the outbreak of the Anti-Japanese War, he served as the commander of the 3rd Battalion of the 771st Regiment, and in the summer of 1938, he carried out the anti-Japanese guerrilla struggle with the main force of the 386th Brigade in the Shanxi-Hebei-Henan border area, and was transferred to the political commissar of the 11th Regiment of the 386th Brigade. In January 1945, Wu Zongxian was transferred to the head of the 771st Regiment and led his troops to move to Guanzhong to participate in the Yan'an Defense Battle in the spring of 1947. On October 15, 1947, the newly formed Fourth Brigade and the Teaching Brigade were ordered to form the Sixth Column of the Northwest Field Army, and Wu Zong served as the deputy brigade commander of the New Fourth Brigade. In January 1949, he served as the commander of the 16th Division of the Sixth Army, and after the founding of the People's Republic of China, he served as the commander of the Hami Military Division. In 1952, he was ordered to form the 25th Air Force Division and served as its commander, and in 1955 he was awarded the rank of major general. 
Finally, let's talk about the 772 Regiment, the three battalion commanders were very tragic, and all of them died heroically in the War of Resistance Against Japan. Ding Silin, commander of the first battalion of the 772nd Regiment, a native of Hong'an, Hubei, joined the Red Army in 1932, served as the commander of the 271st Regiment of the 93rd Division of the 31st Army at the end of 1934, and served as the commander of the first battalion of the 771st Regiment after the outbreak of the Anti-Japanese War, and the commander of the new 1st Regiment of the 386th Brigade in September 1938. In February 1939, the command post headquarters ambushed the Japanese Yasuda Squadron and the 40th Wing Supplementary Brigade in Xiangchenggu, killing more than 250 Japanese soldiers, capturing 8 prisoners, destroying 9 cars, seizing 3 artillery pieces and more than 100 guns, and on July 5, 1939, more than 3,000 people from the 107th Wing of the 109th Division of the Japanese Army carried out a large-scale "sweep" to the anti-Japanese base area in the southeast of Shanxi. On July 8, in order to cover the retreat of the troops, he took the initiative to block the Japanese attack and died heroically at the age of 26. Guo Guoyan, commander of the second battalion of the 772nd Regiment, a native of Huangpi, Hubei, joined the Red Army in 1929, and successively served as the commander of the ninth company of the third battalion of the third regiment of the first independent division of eastern Hubei Province, the commander of the 272nd regiment of the 93rd division of the 31st Red Army, and the commander of the second battalion of the 772nd regiment, the commander of the 3rd division of the Taihang Military Region, and the deputy commander of the third column of the Shanxi Youth Decisive Death after the outbreak of the Anti-Japanese War. At dawn on February 29, 1942, more than 4,000 days of puppet troops swept the town of Dayou, where the headquarters of the third column was located. Guo Guoyan led his troops to ambush in Xigangtou. The ambushed Japanese puppet army was annoyed and angry, and bombarded indiscriminately with artillery, and our position was instantly filled with gunsmoke, and suddenly, an enemy shell roared beside Guo Guoyan, and Guo Guoyan died heroically. 
Yi Liangpin, commander of the 3rd Battalion of the 772nd Regiment, a native of Macheng County, Hubei Province, graduated from the Third Normal School in Changsha and was a rare intellectual among the military cadres of the Red Fourth Front Army. He joined the Red Army in 1928 and successively served as the commander of the first battalion of the 31st Regiment of the 11th Division of the Red Fourth Army, the commander of the 91st Regiment of the 31st Division, and the commander of the 271st Regiment of the 93rd Division of the 31st Army. After the outbreak of the Anti-Japanese War, he was transferred to the commander of the third battalion of the 772nd Regiment, and later went to study at the University of Resistance against Japan, and after graduation, he served as the principal of the 129th Division with the battalion school, the commander of the new 7th Brigade of the 129th Division and the commander of the sixth division of the Southern Hebei Military Region.