The Triple Entente was the pre–World War I alliance between France , Russia , and Great Britain (then the United Kingdom of Great Britain and Ireland).

Core members

  • France (French Third Republic).
  • Russia (Russian Empire).
  • Great Britain (United Kingdom of Great Britain and Ireland).

These three powers coordinated diplomatically and militarily to balance the growing power of Germany and its partners before 1914.

Later wartime partners

Once World War I began, many other countries fought on the Entente/Allied side, such as Serbia, Japan, Italy (after switching sides in 1915), Portugal, and Romania, but they were not original members of the Triple Entente itself.

TL;DR: When asking “which countries were allied by the Triple Entente,” the answer is: France, Russia, and Great Britain. Other Allied nations joined them later in World War I, but they were not part of the original three-power understanding.

Information gathered from public forums or data available on the internet and portrayed here.