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There were a few attempts by Spain to reconquer Mexico (or New Spain, as they called it) between 1821 and 1829, most notably the expedition of Isidro Barradas from Cuba in 1829. All of these failed, despite mexican political division after the dissolution of Augustín de Iturbide's empire, and Spain recognized Mexico's independence in 1836.
So, my question is... how could Spain have defeated the mexican rebels in one of these expeditions and reconquered the country?
If they do, then what sort of compromises will the spanish need to make in order to prevent rebellions from springing up again? Were there enough loyalists there to help them? Would the situation develop into something akin to OTL Cuba?
How does this affect relations with the US, especially on the issues of California and Texas? And could spanish Mexico/New Spain retain the central american states?
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