What is the current DEFCON level?
Short answer: nobody outside the US military knows. The real DEFCON level is not published, so every website that shows "the current DEFCON level" is showing an estimate. That includes World Monitor. This page explains what DEFCON is, when it is publicly known to have changed, and what our number actually measures.
By Apphesus, the team behind World Monitor · History sourced from published histories, checked 4 Nov 2026
Five readiness conditions, counting down
DEFCON, short for defense readiness condition, is the alert scale the US armed forces have used since 1959. It runs from DEFCON 5, the normal peacetime state, down to DEFCON 1, the most severe. Films often get the direction backwards: a lower number means higher readiness.
The level is set by the President and the Secretary of Defense, working through the Chairman of the Joint Chiefs of Staff and the combatant commands. It does not have to be the same everywhere: one command or region can be raised while the rest of the forces stay where they are.
- DEFCON 5
- Normal readiness. The lowest state.
- DEFCON 4
- Increased intelligence watch and strengthened security measures.
- DEFCON 3
- Force readiness raised above normal.
- DEFCON 2
- A further increase in readiness, short of maximum.
- DEFCON 1
- Maximum readiness. Publicly, it has never been declared.
The real current level is not public
The US military does not announce DEFCON levels. What the public knows about past changes often came out afterwards, through officials' accounts and declassified documents. So when a website shows "DEFCON 3 today" in large letters, it is guessing, however official it looks.
That is not a reason to avoid estimates. It is a reason to label them. Ours is an open-source estimate, built from public data, and this page says exactly what goes into it.
Publicly known DEFCON changes
| Event | Level | What happened |
|---|---|---|
| Cuban Missile Crisis, Oct 1962 | DEFCON 3, then DEFCON 2 for SAC | US forces went to DEFCON 3. On 24 October, Strategic Air Command went to DEFCON 2 and stayed there until mid-November. |
| Yom Kippur War, Oct 1973 | DEFCON 3 | On 25 October, during a US–Soviet standoff over the war, US forces including Strategic Air Command, European Command and the Sixth Fleet went to DEFCON 3. |
| Korea, Aug 1976 | DEFCON 3 | Forces in South Korea were raised to DEFCON 3 after two US officers were killed in the Panmunjom axe incident. |
| September 11, 2001 | DEFCON 3 | Defense Secretary Donald Rumsfeld raised forces to DEFCON 3. It was lowered again within days. |
NEVER DEFCON 1. No publicly known record shows the United States at DEFCON 1. Other changes may have happened without being made public.
A DEFCON-style number from public pizza data
World Monitor's OVERVIEW tab shows a "DEFCON" number on its Pentagon pizza index banner. To be precise about what it is: it is computed only from public busyness data for about half a dozen pizza places near the Pentagon. It does not use military data, and nothing about it is official.
The calculation is simple. Take the average busyness of the open places on a 0 to 100 scale, add 10 points for each place that is unusually busy, and cap the result at 100. Then map it onto the familiar five steps.
- Level 5
- Score under 25: Normal Activity.
- Level 4
- 25 to 49: Above Normal.
- Level 3
- 50 to 69: Elevated Activity.
- Level 2
- 70 to 84: High Activity.
- Level 1
- 85 or more: Maximum Activity.
SEPARATE FROM POSTURE. OVERVIEW also has a THEATER STATUS banner that summarizes military posture by region from public data. It is shown next to the pizza index but does not feed the DEFCON-style number.
What our number is not
- Not officialIt is not the US readiness condition and is not endorsed by any government body.
- Not a warningA busy evening at a pizza place is weak evidence of anything. Treat a high reading as a curiosity, not an alert.
- Often wrongOrdinary crowds, closures and missing data move the number. It can read high on a quiet day and low during a real crisis.
- Use real sourcesFor what is actually happening, read the news and official statements. For emergencies, follow local authorities.
See the estimate, with the context next to it
OVERVIEW puts the pizza index and its DEFCON-style number beside theater posture, conflicts and quakes. Free in your browser with no account, and in the iPhone and Android apps.
Questions about the DEFCON level
What is the current DEFCON level?
The real level is not public. The US military does not announce it, so any current DEFCON level you see online, including the DEFCON-style number on World Monitor, is an estimate. Ours is computed from public pizza-place busyness data near the Pentagon and is not official.
Has the US ever been at DEFCON 1?
Not according to any public record. The highest publicly known level is DEFCON 2, ordered for Strategic Air Command during the Cuban Missile Crisis in October 1962.
Who sets the DEFCON level?
The President and the Secretary of Defense, working through the Chairman of the Joint Chiefs of Staff and the combatant commands. Different commands or regions can be at different levels at the same time.
Is any website showing the official DEFCON level?
No. Because the level is not published, no public website can show the official current level. Sites that display one are making an estimate, whether or not they say so.
What do the five DEFCON levels mean?
DEFCON 5 is normal readiness, DEFCON 4 adds increased intelligence watch and security, DEFCON 3 raises force readiness above normal, DEFCON 2 is a further increase short of maximum, and DEFCON 1 is maximum readiness.