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September 11, 2026Short & citedBlog
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Civic Brief • Conflict

Wars

Wars are organized armed conflicts between states, governments, or other armed groups, usually pursued for political, territorial, economic, or ideological aims.

Updated September 11, 20261 min readCited sources

War is organized armed conflict between states or groups, typically with sustained violence and political aims. It is a distinct concept from the broader term 'conflict', which can include lower-intensity disputes.

What it is

War is generally defined as a large-scale, organized armed struggle between political communities or armed groups. It is marked by prolonged violence, military command structures, and significant social and economic disruption. Common aims include political, territorial, economic, or ideological objectives.

Major wars in history

Frequently cited major wars include World War I, World War II, the Hundred Years' War, the Thirty Years' War, the Napoleonic Wars, the Mongol conquests, the Crusades, and the American Civil War. World War II is widely identified as the deadliest war in history. The list varies by criteria such as scale, casualties, and historical impact.

How wars end

Wars usually end through surrender, a negotiated peace treaty, an armistice, a ceasefire, or the collapse of one side's capacity to fight. Some conflicts also end without a formal settlement. The outcome often shapes the political and territorial landscape for years.

In short

  • War is organized armed conflict with sustained violence.
  • Wars can involve states, governments, or non-state armed groups.
  • World War II is the deadliest war in history.
  • Conflict is a broader term than war.
Canadian angle

Canadian readers may encounter wars in Canadian history through participation in the World Wars, the Korean War, Afghanistan, peacekeeping missions, and debates over how conflicts are defined in historical and legal sources.

Quick questions

What are the major wars in history?
Frequently cited major wars include World War I, World War II, the Hundred Years' War, the Thirty Years' War, the Napoleonic Wars, the Mongol conquests, the Crusades, and the American Civil War. The list varies by criteria such as scale, casualties, and historical impact.
What is the difference between a war and a conflict?
A conflict is any serious disagreement or struggle, including political or armed disputes. A war is a specific kind of conflict involving sustained organized armed violence, usually between states or organized armed groups.
How do wars end?
Wars usually end through surrender, a negotiated peace treaty, an armistice, a ceasefire, or the collapse of one side's capacity to fight. Some conflicts also end without a formal settlement.

Sources

  1. Encyclopaedia Britannicahttps://www.britannica.com/topic/list-of-wars-2031197
    Supports: Chronological list of wars and historical framing of wars as major armed conflicts.
  2. U.S. Department of Veterans Affairshttps://department.va.gov/americas-wars/
    Supports: Example of a government source describing modern conflicts and war end dates.
  3. Wikipediahttps://en.wikipedia.org/wiki/War
    Supports: General definition of war, characteristics, aims, and comparison with warfare.
  4. Wikipediahttps://en.wikipedia.org/wiki/World_war
    Supports: Definition of world war and conventional use for World War I and World War II.
  5. Imperial War Museumshttps://www.iwm.org.uk/history/timeline-of-20th-and-21st-century-wars
    Supports: Broad historical context for wars in the 20th and 21st centuries.