Which country entered World War I in 1917 as part of the Triple Entente?

The United States entered World War I in 1917 as a member of the Triple Entente, which included allies such as France, the United Kingdom, and Russia. The entry of the United States significantly bolstered the morale and military capabilities of the Entente powers, providing fresh troops and resources at a crucial juncture in the war. Various factors contributed to this decision, including unrestricted submarine warfare by Germany, which threatened American ships and lives, and the Zimmerman Telegram, in which Germany proposed a military alliance with Mexico against the United States. The involvement of the United States marked a turning point in the conflict, leading to increased pressure on the Central Powers and contributing to their eventual defeat.