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The three nations that made up the Triple Alliance were Germany, Austria-Hungary, and Italy. These nations stood against the three nations of the Triple Entente - France, Russia, and Great Britain.

It was formed on 20 May 1882 and renewed periodically until it expired in 1915 during World War I.  All the members pledged mutual support in the event of an attack by any other great power.

The countries that made up the triple alliance were  

  • Austria-Hungary,
  • Italy
  • Germany

What was the triple alliance?

This was a union and agreement that was formed between Germany, Italy and Austria/Hungary just before the first world war began.

The alliance was a secret agreement that had all of the nations working against the countries they felt were threats.

Read more on the triple alliance here:

https://brainly.com/question/1375584