DEFCON was used in the 1983 film WarGames, the 1996 films Independence Day, The Sum of All Fears, Crimson Tide and Armageddon, among many others.This Scale Shows what DEFCON 1 would look like on this scale, meaning nuclear war is imminent armed forces (like the Army, Navy, Air Force) and different bases or command groups can be activated at different defense conditions. The DEFCON level is controlled primarily by the President and the Secretary of Defense, through the Chairman of the Joint Chiefs of Staff and the Combatant Commanders, and each DEFCON level defines specific security, activation and response scenarios for the troops in question.ĭifferent branches of the U.S. In September, 2002, US Marines stationed in the Persian Gulf were put on DEFCON 2 prior to the 2003 invasion of Iraq. Secretary of Defense Donald Rumsfeld ordered the increased DEFCON level. The third time the United States reached DEFCON 3 was during the Septemattacks. armed forces were technically at DEFCON 3 status during the 1973 Yom Kippur War. ICBM sites were at DEFCON 4, rather than 5. SAC remained at DEFCON 2 until November 15.
On October 23, Strategic Air Command (SAC) was ordered to DEFCON 2, while the rest of the U.S. During the Cuban Missile Crisis on October 22, 1962, the U.S. The highest confirmed DEFCON ever was Level 2.
The highest level of DEFCON known to have been used military have been placed at higher readiness levels on numerous instances. Since the system was introduced, portions of the U.S. In November 1959, the Joint Chiefs of Staff created the DEFCON system so that a uniform readiness posture could be prescribed in the various military commands. In fact, DEFCON 5 is the lowest state of readiness. Movies and popular culture often misuse the DEFCON system by "going to DEFCON 5" during a state of emergency. Increase in force readiness above that required for normal readiness Increased intelligence watch and strengthened security measures The five DEFCONs, their exercise terms, and their general descriptions are shown below. The current exercise terms have been used since at least 1960, when they were used in a North American Aerospace Defense Command (NORAD) exercise. This is to preclude the possibility of confusing exercise commands with actual operational commands. Additionally, during nuclear / normal tests, exercises, or drills, the United States Department of Defense uses exercise terms when referring to the DEFCONs. The preparations that take place under the five DEFCONs are difficult to describe because they vary between many commands, they have changed over time as new weapon systems were deployed, and the precise details remain classified.
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