Having fought together against a common foe and facing an uncertain future together the two new republics formed the Confederation of the Rio Grande and Texas as a means to mutual defense and cooperation.
The flag of the Confederation has four stars - one for each of the states: Texas, Coahuila, Nuevo León, and Tamaulipas.
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Sean Sherman has been a fan of alternate timelines ever since seeing Spock with a goatee. By day he is a CPA, at night he explores the multiverse and shares his findings over at his blog, Other Times.