"Last war: West" is a Chinese board wargame based on the Cold War, simulated from middle to the end of the 20th century. Players will play the role of the highest staff of the two camps in this game, command the troops of the countries they belong to, and simulate the confrontation between Warsaw Pact and NATO during the peak standoff of the Cold War. This work is based on the division and brigade level. It focuses on combing firepower and combat processes, and introducing more reasonable and operational air force mechanisms to get rid of the "Cold War drived by World War II system" criticized by players. Through the gradual disclosure of military information in the past 30 years since the end of the Cold War in real world, we could restored the fight against both sides in If... history as realistically as possible.