Demilitarized Zone

Concept Security and Defense Preferred

Area in which parties agree not to station military forces or weapons, usually along a ceasefire line.

Independent referenceNot an official or legal definition
Sources citedSee the sources at the end of this page
Status Under reviewLast updated 11 October 2026
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Definition

In plain language

A demilitarized zone is a strip of land where armed forces and weapons are banned by agreement. It is often used to keep two opposing armies apart.

Academic definition

A DMZ is created by agreement, commonly in an armistice, to remove military forces and installations from a defined zone. The Korean Armistice Agreement of 1953 set up a zone extending two kilometres on each side of the Military Demarcation Line, and the Versailles Treaty of 1919 (Articles 42 to 44) demilitarised the left bank of the Rhine and a strip fifty kilometres to its right. The zone does not change sovereignty, and its legal content depends on the creating instrument.

Classification

Term type
Concept
Category
Security and Defense
Subject field
Security and Peacekeeping
Subfield
Separation of Forces
Difficulty level
Beginner
Grammatical category
noun phrase

Language variants

Alternative terms
  • demilitarised zone
  • neutral zone
Non-preferred terms
  • not_applicable
Abbreviations
  • DMZ
Acronyms
  • not_applicable
Native terms
  • zone démilitarisée (French)
Transliteration
not_applicable
Pronunciation
not_applicable

Context

Legal effect: Binding

Scope

Covers land zones from which military forces are excluded; buffer zones that allow limited forces under monitoring, and maritime areas, are separate.

Legal context

There is no general treaty on DMZs; each rests on its own agreement, such as the Korean Armistice Agreement or the Versailles Treaty. Additional Protocol I Article 60 recognises agreed demilitarised zones and forbids parties from extending military operations to them.

Diplomatic context

Parties negotiate the width, entry rules and verification, and violations or incidents in the zone are reported to the supervising body.

Institutional context

Supervised by armistice commissions, observer missions or the parties themselves, depending on the agreement.

Historical context

Examples include the Rhineland after 1919 and the Korean DMZ from 1953, which remains one of the most heavily guarded borders in the world.

Why it matters

A DMZ lowers the risk of accidental clashes by separating forces, though it does not itself resolve the underlying dispute.

Usage

Register: Institutional

Usage note

Use 'DMZ' after first mention, and specify the agreement creating the zone.

Example

The armistice created a demilitarized zone between the two armies.

Example scenario

After a ceasefire, both armies withdraw from a four-kilometre strip and a commission checks compliance. When a patrol enters the strip, the commission records the incident and asks the responsible party to explain.

Common misuse

Assuming a DMZ is free of military presence in practice; many are heavily monitored and contain guard posts.

Not to be confused with

  • Buffer zone
  • Military demarcation line
  • Demilitarized maritime area
  • Safe zone

Sources

  1. Protocol Additional to the Geneva Conventions of 12 August 1949, and relating to the Protection of Victims of International Armed Conflicts (Protocol I) (1977), International Committee of the Red Cross, Article 60. ihl-databases.icrc.org
  2. Official definition. not_found_in_source
  3. Treaty reference. ihl-databases.icrc.org
  4. Korean Armistice Agreement (1953), Article I. not_found_in_source
  5. not_found_in_source. not_found_in_source

Source type: Treaty. Source reliability: Primary.

This entry is an independent reference definition, not an official or legally binding text. Where an official definition exists, it is linked above and is authoritative. Read our methodology.

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