Allies of World War I
The Allies of World War I are sometimes also referred to as the Entente Powers or The Triple Entente (entente being French for "agreement"). The main allies were France, the Russian Empire, the British Empire, Italy and the United States. France, Russia and Britain entered World War I in 1914, as a result of their Triple Entente alliance. Many other countries later joined the Allied side in the war.
It should be noted that U.S. President Woodrow Wilson and his administration were determined not to define the U.S. as an ally. The United States declared war on Germany on the grounds of German violations of American neutrality, by attacking international shipping. The U.S. entered the war as an "associated power", rather than a formal ally of France and Britain, and maintained that distance throughout the war.
Although the Dominions and Crown Colonies of the British Empire made significant contributions to the Allied war effort, they did not have independent foreign policies during World War I. Operational control of British Empire forces was in the hands of the five-member British War Cabinet (BWC). However, the Dominion governments controlled recruiting, and did remove personnel from front-line duties as they saw fit. From early 1917 the BWC was superseded by the Imperial War Cabinet, which had Dominion representation. The Australian and Canadian army units were grouped in their own separate army corps, under Australian and Canadian commanders, who reported in turn to British and/or French generals.
In April 1918, operational control of all Allied forces on the Western Front passed to the new supreme commander, Maréchal de France Ferdinand Foch.