This question is too vague to answer with a single specific treaty, because many different wars were each ended by their own peace treaties.

Clarifying the question

To answer “what treaty ended the war? ” accurately, the specific war needs to be known. For example, several major wars are associated with well‑known peace treaties:

  • World War I → Treaty of Versailles (1919) is commonly cited as the treaty that ended that war.
  • World War II (in Europe and with minor Axis states) → Paris Peace Treaties (1947) formally ended hostilities with Italy, Hungary, Romania, Bulgaria, and Finland.
  • War with Japan in World War II → Treaty of San Francisco (Treaty of Peace with Japan, 1951/1952) restored peace and ended the occupation of Japan.

So the answer depends entirely on which war your post or discussion is about.

Quick Scoop (for your post)

If this is for a short, general‑audience “Quick Scoop” section, you could write something like:

The phrase “what treaty ended the war?” doesn’t have a single correct answer. Different wars ended with different peace treaties: for example, World War I is tied to the Treaty of Versailles, World War II’s European settlements to the 1947 Paris Peace Treaties, and the war with Japan to the 1951 Treaty of San Francisco. To know the exact treaty, you always have to specify which war you mean.

If you tell which war you mean (World War I, World War II, American Revolution, War of 1812, etc.), a precise treaty name and one‑sentence explanation can be given.

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