Congo River mentioned in 1535. Abraham Ortelius in his world map of 1564 labeled as "Manicongo" the city at the mouth of the river. The tribal names in "Kongo" possibly derive from a word for a public gathering or tribal assembly. The modern name of the Kongo people or "Bakongo" was introduced in the early 20th century. The name "Zaire" is from a Portuguese adaptation of a Kikongo word, ("river"), a truncation of ("river swallowing rivers"). The river was known as "Zaire" during the 16th and 17th centuries; "Congo" seems to have replaced "Zaire" gradually in English usage during the 18th century,
27th Group Army then participated in the battle of Huaihai where it confronted and destroyed the KMT Huang Bo Tao Army Group. In February 1949 the unit was redesignated and reorganized as the 27th Army. In 1949 the 27th Army was composed of the 79th, 80th and 81st Divisions. The unit took part in the assault on Shanghai. The 27th Corps was part of the first contingent of Chinese forces to be deployed to Korea in October 1950 to fight against United Nations forces. It consisted of the 79th, 80th, 81st and 94th Divisions, though the 94th Division was attached to the 27th