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.
The signing comes amid North Korean threats to attack the allies over their joint military drills and recent punishing UN sanctions aimed at Pyongyang's latest nuclear test.
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. Work on the plan began after a North Korean artillery attack on a South Korean island in 2010 killed four.
The allies also have a separate plan in the case of a full-blown war on the Korean Peninsula.
There are 28,500 U.S. troops stationed in South Korea.