The Entente was made up of France, the United Kingdom and Russia. The leaders were Georges Clemenceau from france, David Lloyd George and King George V for the United Kingdom , and Tsar Nicolas II for russia. they later added in the United States. since they added in the U.S. , when the war started they were on their side and fought with them. Russia left this group during the war because they decided to sign a treaty with the Central Powers (German Empire, Austria-Hungary, Bulgaria, and the Ottoman Empire) and that made them dropout of the war.