Join in mutually supportive association. To join or enlist somebody, in an association with one or more other states, organizations, or individuals for mutual help and support or the achievement of a common purpose. During World War II, the allied forces included the United States, Great Britain, France, and Russia.
Belgium, France, Great Britain, Russia and Serbia. The war became more truly a world war as Japan, in 1914, and Italy, in 1915 joined the Entente Powers, while Turkey lined up with Germany and Austria. Other countries were drawn in, one by one, until by 1917 every continent and all the oceans of the world were involved. Canada was at war automatically when Britain was at war.
The twenty-six nations, including the U.S., U.S.S.R. and Great Britain, that fought the Axis powers in World War II.