it is type of Federation in which Two or more than two States combine to form a bigger unit to secure their security ani in this type of federation Each estate have equal power. hope it helps u 💔
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Rishabh answered this
Independence states coming on their own to form a bigger unit, so that by pooling sovereignty and retaining identity they can increase their security.
( Make sure, here state means Country don't be confuse )
Examples of coming together federation - USA , Australia
