Which countries joined the federation?

Answer 1

The countries that joined the federation typically refer to those that became members of a specific political or economic union, such as the United States or the Federation of Australia. In the case of the United States, the original 13 colonies became the first states, while additional states were admitted over time. In Australia, six states and two territories formed the federation in 1901. For a more precise answer, please specify which federation you're inquiring about.