Seventy years ago, the Chinese People's Volunteers (CPV) army crossed the Yalu River and fought alongside the army of the Democratic People's Republic of Korea (DPRK) against the Republic of Korea (ROK) and U.S.-led UN forces. A total of 2.9 million CPV soldiers entered the battlefield, 197,653 of whom sacrificed their lives in the War to Resist U.S. Aggression and Aid Korea (1950-1953 Korean War).

As 2020 marks the 70th anniversary of the outbreak of the Korean War, here are five facts you may not know about the conflict.