"Proud Legions" by John Antal
Is a fictional story set in the mid 90s, where the North Koreans launch Operation Daring Thrust, a lightning attack into South Korea, masterminded by NK Marshall Kim Seung-Hee (aka the Wolf), the North Koreans make their advance towards Seoul and the only thing in their way is the 2nd Batallion, 72nd Armor Regiment of the US Army, commanded by Lt. Col Michael Rodriguez.
The story takes is validity because John Antal is a retired US Army Colonel, West Point Graduate and served in teh US Army for 30 years, with his last command as operations officer (G3) for the III Armored Corps at Fort Hood, Texas. As you read the novel, you realize that it bears strong resemblance to the current state of affairs in North Korea.
A very good read, IMHO.