South Korea and the United States have signed a new military plan that lays out how the allies will communicate with each other and react to any future North Korean aggression.Seoul\'s Joint Chiefs of Staff said Monday that the plan is designed to counter a future limited attack by North Korea, but details weren\'t released.The allies also have a separate plan in the case of a full-blown war on the Korean Peninsula, according to a report of the Associated Press.There are 28,500 U.S. troops stationed in South Korea.