From DEFCON 5 to DEFCON 1: understanding the DEFCON levels.

The DEFCON system, consisting of five escalating levels (5 to 1), is used by the US military to denote their readiness for potential nuclear attack.

Make Ready! Defensive Conditions and Posture During Emergencies

DEFCON 1 by Welldone Asyncron — Kickstarter

DEFCON Levels Explained - VeteranLife

How to Understand the DEFCON Scale: 9 Steps (with Pictures)

Limited Gaming and Private Shopping – June 5th

Russia Threatens Nuclear War Again

Defcon Levels and What Each Color Means to Our National Security

5 Reasons To Avoid DEFCON 1 Leadership – Scott Cochrane

Morgan Stanley: Econ DEFCON 3

80% DEFCON on

Defcon 5 - TV Tropes

We are currently at DEFCON 3. : r/coolguides

Have we ever been at DEFCON 1? - Quora

The Only Losing Move: DEFCON and Nuclear War