Hi, I do believe that half of your question did not get submitted! I’ll be more than happy to answer it if you could put it up! :)
The Pentagon Papers revealed that the Harry S. Truman administration gave military support to France against the Communist led Viet Minh, which directly involved the United States in the Vietnam War.
Answer:
Russia
Explanation
The Triple Entante contained the countrys of Great Britain, France, Serbia and Russia. While the Triple Alliance contains the countrys of Germany, Itlay and Austria-Hungary