alternatehistory.com

I've read my fair share of Mexico TLs in this site, and for some reason in many of them, when/if Mexico balkanizes there's always a Republic of the Rio Grande. Why is that?
OTL it didn't even last a year, didn't do anything noteworthy, and collapsed when its leaders decided to take the Mexican offer/bribe to end the rebellion, so I've been wondering why a lot of people use it in TLs if it had zero chance of succeeding.
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