What do you mean by coming together federation?
When it comes to government, federalism can be defined as a system in which power is distributed between the center and its constituent portions, such as states or provinces.
Coming together federalism is the term used to describe when independent states band together to form a larger unit on their own. Throughout the Coming Together Federation, the central government and the states always appear to be on an equal footing in terms of power.
Examples include the United States, Australia, and Switzerland.