The Korean War: June 1950-May 1951 is an Operational level wargame simulation of the first year of the conflict for control of the Korean peninsula, from the first North Korean attack, through UN-forces invasion of Inchon and the subsequent drive into North Korea that unleashed the Chinese counter attack. The Korean War: June 1950-May 1951 is an Operational level wargame simulation of the first year of the conflict for control of the Korean peninsula, from the.