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US DoD, JP 2-01:
Intelligence that is crucial and requires the immediate attention of the commander. It is required to enable the commander to make decisons that will provide a timely and appropriate response to actions by the potential or actual enemy. It includes but is not limited to the followin: a. strong indications of the imminent outbreak of hostilities of any type (warning of attack); b. aggression of any nature against a friendly country; c. indications or use of nuclear, biological, and chemical weapons; and d. significant events within potential enemy countries that may lead to modification of nuclear strike plans.

http://criminaljustice.rutgers.edu/images/syllabi/17_Spring/SP17AdvCJSemFARMER.pdf

https://cryptome.org/2014/11/insa-sci.pdf