This is the Argentine confederation, a loosely federalistic beta testing version of the modern land of silver.

WHY I THANK NO ONE SUGGESTS THIS AS A FORMABLE:

-It barely controlled the modern lands of argentina, didn't even reach the lands of other modern day countries

-it was just a transitional period rather than a era.

-The short independance of Buenos Aires killed this already unstable nation.

-TLDR: merely an ideological mess.