People's Liberation Army
The People's Liberation Army is the army of the People's Republic of China
The PLA traces it's roots back to the Nanchang Uprising on August 1st, 1927, in which the communist rebels attacked the Guo Min Tang controlled city of Nanchang. Afterwards, the rebels, then called the Red army, or peasents army, fleed to the mountains of Hunan and Jiangxi, and used Mao Zedong's guerrilla warfare tactics to fight the loyalist Guo Min Tang army. However, the Japanese invasion of China would put a hold on the communist war effort to fight the Japanese invaders. After the Japanese defeat in [[World War II], the "Red Army" adopted the name the Peoples Liberation Army, and they proceded to defeat the loyalist Guo Min Tang army. 
Army of the People's Republic, and the Korean War
After the formation of the People's Republic of China on October 1st, 1949, the People's Liberation army quickly added an Air Force and a Navy. Afterwards, China began reciving support from the Soviet Union, in particular during the Korean War. According to the Chinese Consulate, 70% of the PLA was sent to the Korean war effort, apparently almost three million "volunteers"  during this time, China recieved extensive ammounts of effort from the Soviet Union
Vietnam War and the Sino-Vietnamese War
Although the Chinese were involved in the Vietnam War, their main function was to supply the Vietong with weapons  . However, in 1979 China did have a brief but violent dispute with Vietnam over the Vietnamese invasion of Cambodia, in which China sent a force of 85,000 into Vietnam.