Single Integrated Operational Plan

The Single Integrated Operational Plan (SIOP) was the United States' general plan for nuclear war from 1961 to 2003. The SIOP gave the President of the United States a range of targeting options, and described launch procedures and target sets against which nuclear weapons would be launched. The plan integrated the capabilities of the nuclear triad of strategic bombers, land-based intercontinental ballistic missiles (ICBM), and sea-based submarine-launched ballistic missiles (SLBM). The SIOP was a highly classified document, and was one of the most secret and sensitive issues in U.S. national security policy.

The first SIOP, titled SIOP-62, was finished on 14 December 1960 and implemented on 1 July 1961 (the start of fiscal year 1962). The SIOP was updated annually until February 2003, when it was replaced by Operations Plan (OPLAN) 8044. Since December 2008, the US nuclear war plan has been OPLAN 8010, Strategic Deterrence and Global Strike.

While much of the United States' nuclear war planning process remains classified, some information on the former SIOP planning process has been made public. The planning process began with the President issuing a presidential directive establishing the concepts, goal, and guidelines that provided guidance to the nuclear planners. The Secretary of Defense then used the President's guidance to produce the Nuclear Weapons Employment Policy (NUWEP) that specified basic planning assumptions, attack options, targeting objectives, types of targets, targeting constraints, and coordination with combatant commanders. The NUWEP was then used by the Joint Chiefs of Staff (JCS) to create the "Joint Strategic Capabilities Plan (JSCP), Annex C (Nuclear)." This document established a more detailed and elaborate set of goals and conditions that included targeting and damage criteria for the use of nuclear weapons. The final stage in the planning process occurred when the Strategic Air Command (SAC) (from 1961 to 1992) or the United States Strategic Command (USSTRATCOM) (from 1992 to 2003) took the guidance from the JSCP and created the actual nuclear war plan that becomes the SIOP. Detailed planning was carried out by the Joint Strategic Target Planning Staff (JSTPS) co-located with SAC Headquarters in Omaha, Nebraska.

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