When the subject is North Korea, it is hard for a military historian not to think of Thanksgiving 1950. It was around that date that Chinese forces, having stealthily entered the country and already engaged in their first attacks, hit American troops and hit them hard. Two months earlier U.S., South Korean, and other allied forces crossed the 38th parallel dividing the two Koreas, defeated North Korean forces, and advanced toward the Chinese border on the Yalu River. It was part of America’s response to the North Korean invasion of South Korea in June 1950. America saved the south but incautiously tried to conquer the north without reckoning on Chinese intervention. It was a blunder of the first order.