These include LERTCON (used by the US and NATO allies), REDCON (used by individual US military units), and more. X Research source X Research source However, the most important alert scale besides DEFCON is likely the EMERGCON scale. Defense Emergency: Made in the event of major hostile attacks against U.S.These conditions (which have never been issued before) are thought to be issued in the event of nuclear war and include civilian directives as well as military ones. Air Defense Emergency: Made in the event of attacks against the US, Canada, or military installations in Greenland.Issued by unified commander or higher authority. Issued by the Commander in Chief of the North American Aerospace Defense Command. Note that, by definition, all military forces go to DEFCON 1 in the event of an EMERGCON being issued.
