UnGoogleable Research – What I Already Know

I know what each DEFCON means such as
DEFCON 5 means that there is no war and its peaceful and the military is set to its lowest readiness condition.
DEFCON 4 means its normal but the military is still set to the lowest readiness condition, this DEFCON is the normal defense condition and it is never turned off.
DEFCON 3 means an increase in force readiness above normal readiness
DEFCON 2 means further increase in force readiness, but less than maximum readiness, this is also the highest DEFCON that the United States has set it to during the Cuban Missile Crisis and the military are authorized to send ballistic missiles.
DEFCON 1 means maximum force readiness and the military are authorized to send nuclear bombs.

The procedures are different between many commands, they have changed over time as new weapon systems are created, and the precise details remain classified. For each DEFCON the Army, Marines, and other branches have different procedures, drills, and commands as the conditin of readiness changes.