The Soviet Union began assisting the People's Republic of China in its establishment of a modern air force in 1950, when Soviet Air Force regiments were sent to train local pilots. China's involvement in the Korean War in late October 1950 inevitably drew Soviet pilots into the war. A total of 52 Soviet pilots scored five or more victories in the Korean War. The history of these covert actions has been a long-buried secret and this book will be the first English publication to detail the only instance when the Cold War between Russia and the US became "hot."