Historians have written about the Vietnam War for more than half a century, but few have done so with access to the decision-making records of the United States’ main adversary, the government of North Vietnam. Dr. Lien-Hang Nguyen, one of the world’s leading authorities on the history of the Vietnam War and author of Hanoi’s War: An International History of the War for Peace in Vietnam, delves into the communist side of the war.