The Triple Entente(Allied powers) consisted of Britain,France,Russia,Italy,and the United states.The major leaders were David Lloyd George,Wilhelm II,Nicholas II Of Russia,Vladimir Lenin,and Woodrow Wilson.
US enter the war:
The US joined the Allied powers.The 2 main events that caused the US to join the war was the sinking of the ship Lusitania and the Zimmermann telegram.This was a turning point for the war because now the allied powers had more support.
Russia leaves the war:
An armistice is a temporary agreement between two countries to stop fighting.Russia left the war because many of their soldier had died or been captured.Germany now had to only focus on one front since the eastern front no longer need to be fought in.