The origin of the 12th Army lies in the surrender of the 74th Division of the Chinese Nationalist
National Revolutionary Army, as well as with the sixth column of the
Second Field Army. On 9 February 1949, the 34th, 35th and the
36th Divisions were incorporated into the Twelfth Army. On 29 November 1949,
Chongqing was captured and later the
Battle of Chengdu was fought. In December 1950, the 12th Army entered the
Korean War as the 12th Army of the Chinese
People's Volunteer Army (), quickly finding itself involved in the
Chinese Fifth Phase (Spring) Offensive. The 12th Army's most notable contribution to the war was the 1952
Operation Showdown, known in Chinese as the Shangganling Campaign. Despite constant barrages of artillery fire and bombings, the 12th Corps, temporarily placed under command of the PVA 15th Corps, held
Sniper Ridge against
Republic of Korea forces and those of the
United States Army's
7th Infantry Division. Although incurring catastrophic casualties, the Chinese claimed victory in the battle and would go on to produce several major motion picture films such as
Battle on Shangganling Mountain depicting the saga. In April 1954, the 12th Army departed
North Korea and returned to
garrison in China in
Hefei City,
Anhui Province and Xuzhou City, Jiangsu Province. During the military downsizing by Deng Xiaoping, the 12th Army was reorganized into the 12th Group Army of the
People's Liberation Army and given the
Military Unit Cover Designator (MUCD) Unit 83226. The MUCD was changed again to Unit 73061 under the
Nanjing Military Region. On 1 August 1983, the
2nd Tank Division was attached to the 12th Army Corps. Later, in May 1989, the 12th Army's 34th, 36th and 110th Divisions, Artillery Brigade, and Anti-Aircraft Battalion were deployed to Beijing to
enforce martial law and suppress the
Tiananmen Square protests of 1989. In 2016, the military regions were abolished and replaced by
theater commands; 12th Group Army was subordinated to the new Eastern Theater Command. In April 2017, the number of group armies was reduced and the 12th Group Army was redesignated as the 71st Group Army. ==Organization==