Under Operations Plan 5027 (CINCUNC/CFC OPLAN 5027), the United States plans to provide units to reinforce the Republic of Korea in the event of external armed attack. These units and their estimated arrival dates are listed in the Time Phased Force Deployment List (TPFDL), Appendix 6, to Annex A to CINCUNC/CFC OPLAN 5027. The TPFDL is updated biennially through U.S./ROK agreements. CINCUNC/CFC OPLAN 5027 is distributed with a SECRET-U.S./ROK classification. The Ulchi-Focus Lens (UFL) exercise is the largest Command Post Exercise [CPX] among JCS Exercise category. It provides an opportunity for commanders and staffs to focus on strategic and operational issues associated with general military operations on the Korean peninsula. During this exercise each August, the ROK-US Combined Forces Command (CFC) and the United Nations Command (UNC) of Korea, as well as USFK practice the implement of OPLAN 5027 with the scenario of North Korean Peoples Army’s (NKPA) aggression. Combined political-military training emphasizes Flexible Deterrent Options (FDO), ROK mobilization, US reinforcement, and synchronization of Deep, Close and Rear battles.
OPLAN 5027 is the operations plan that is the "go to war in Korea" plan. Tasks performed during the early denial phase of OPLAN 5027 include Noncombatant Evacuation Operations (NEO) operations and theater Reception, Staging, Onward Movement and Integration [RSOI]. This phase of OPLAN 5027 assumes the sustainability of the southern defense and consequently enough time for reinforcements. Tasks performed during the Destruction Phase of the OPLAN involves a strategy of maneuver warfare north of the Demilitarized Zone with a goal of terminating the North Korea regime, rather than simply terminating the war by returning North Korean forces to the Truce Line. In this phase operations would include the US invasion of north Korea, the destruction of the Korean People’s Army and the north Korean government in Pyongyang. US troops would occupy north Korea and "Washington and Seoul will then abolish north Korea as a state and ‘reorganize’ it under South Korean control.
Given the parameters of OPLAN 5027, the narrow window for a decisive and relatively safe North Korean opportunity would be between a week and a month -- during the Denial Phase, before the rapid deployment of US light forces would be followed by the arrival of advance units of heavier divisions. North Korea would have significant incentive to achieve decisive results during this phase, at least through the use of chemical weapons against US forces in South Korea. North Korea might also seek to discourage Japanese support for reinforcments through threatening the use of nuclear weapons against US facilities in Japan, or threatening the use of chemical or biological weapons against the Japanese population, delivered either by missiles or clandestine means. The credibility of these threats against Japan might be enhanced through "demonstration" attacks that were not of sufficient magnitude to provoke American nuclear retaliation.
The Destruction Phase of OPLAN 5027 evidently poses the issue of national entity survival for the North Korean regime, and would be the most plausible circumstances under which the North would plausibly contemplate initiating the use of nuclear weapons, striking first in the last resort.
A March 2005 statement by the Foreign Ministry of the DPRK noted that "The DPRK and the U.S. are in the relationship of belligerency and at war technically. Therefore, it is quite natural that the DPRK has manufactured nukes for self-defence and continues to do so to cope with the policy of the Bush administration aimed at mounting a preemptive nuclear attack on it."
In addition to the political and military value of special weapons, North Korea apparently views the development and possession of special weapons as providing near and long-term economic benefits. North Korea has produced and sold large numbers of various models of missiles for significant amounts of money to customers such as Iran and Pakistan. North Korea has also found development of special weapons an effective means of extracting money from the western nations, notably the United States and Japan.
http://www.globalsecurity.org/wmd/world/dprk/doctrine.htm
..OPLAN 5027 and, although it's been
updated many times during various administrations, both Democratic and Republic, the gist of it remains the same. In addition to massive amounts of military ordnance, America guarantees to send 400,000 to 690,000 soldiers to South Korea to stave off a North Korean onslaught.
With our military stretched to the breaking point in Afghanistan and Iraq, a war with North Korea could only be fought one way - by reinstituting compulsory selective service.
http://www.newshounds.us/2006/10/17/oplan_5027_is_it_our_ticket_to_the_draft.php