A world full of United States of X

Today there are only 2 countries (AFAIK) that have "United States" in their name - the USA, Mexico. There are also some other countries that could adopt United States in their name - Brazil, India, Australia, and Germany, to name a few. But what other ones could of formed, preferably with United States in their name?

The US of Europe is a future possibility and for the past there might of been a US of Africa if the US really colonized Liberia.
 
Brazil was actually called "United States of Brazil" until the Military Government changed it name to "Federative Republic".

Now, a possibility is an United States of Greater Austria, enviosened by Archduke Franz Ferdinand. Or, as I would prefer it to be called, United States of the Danube.
 
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