What-If – Territorial Expansion of an Independent Lone Star Republic of Texas

What if an expanded Independent Texas surviving into the present along the way incorporated either Mexican or both Mexican and US territories?

1) Yellow - The former including Mexican territories from Sonora and Sinaloa to Nayarit in the West up to the Gulf of California as well as Tamaulipas and the upper northern part of Veracruz, yet with a part of Texas north of Plainview, Hale County being conceded to the US state of Oklahoma and the US also gaining the entire Baja California Peninsula.

2) Orange - Including the above Mexican territories plus US territories of Oklahoma, New Mexico and Arizona.

How would such expanded Texas fare in the first scenario and what effect would it have on a now diminished Mexico?

Also what impact would the loss of Oklahoma, New Mexico and Arizona mentioned in the second scenario have on the US?

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I feel like Texas would end up being dominated by their larger American cousins. I feel it unlikely for the Texans to expand into the Orange; and they might even loose land in the United States' quest to reach the Pacific. Expaning into Mexico is possible, although I find that the extent to which you've shown to perhaps be a bit excessive. Texas' main motivation for independence was that they were usually Protestant Anglo-Americans and their rulers were Catholic Hispanics, so it would be redundant for them to capture large quantities of Catholic and Hispanic land. Plus, such a large conquest would be rather infesible. Something a bit more moderate may be better.

But if you did expand texas. . assuming that the Texans didn't enforce mass deportations, genocide or an incredibly effective culture conversion program(And all of these would lead to immense problems aswell) its internal politics would be dominated by a struggle between Catholic Hispanics and the Protestant Anglos and such a situation would likely to lead to a lot of conflict. With less US investment, we very well may see Texas become another Oil based state. For Mexico well. . they'd probaly have a very very strong anti-texan and anti-anglo sentiment given the massive concessions they gave away in territory and the lives lost. Not to mention they'd probaly support any seperatists in Texas. But they'd be a lot more insignifigant than they are today. For the Americans, I still feel they'd be a major world power. I think it would weaken their position in WW2(Assuming it isnt butterflied) though, as with Texas gone the US just lost a lot of oil. Could effect their industrial age too. On the bright side, we could see other states become more developed and urban, especially in the midwest, as Oil is found elsewhere as Americans are forced to prospect for the black gold. A very interesting thing to ponder is how an independent Texas would react to the Civil War; in a gambit to weaken their neighbor they may side with the Confederacy especially since they'd probaly have Slavery and a hatred for people who arnt Anglo-American. But this is all hypothetical.
 
What if an expanded Independent Texas surviving into the present along the way incorporated either Mexican or both Mexican and US territories?

1) Yellow - The former including Mexican territories from Sonora and Sinaloa to Nayarit in the West up to the Gulf of California as well as Tamaulipas and the upper northern part of Veracruz, yet with a part of Texas north of Plainview, Hale County being conceded to the US state of Oklahoma and the US also gaining the entire Baja California Peninsula.

Not likely; by the 1840s, Texas was in serious fear of Mexican reconquest. Invading Mexico was not on.

2) Orange - Including the above Mexican territories plus US territories of Oklahoma, New Mexico and Arizona.

If the U.S. does not annex Texas, it is very unlikely to acquire the "Mexican Cession", so New Mexico and Arizone would not be "U.S. territories".

As to Oklahoma, it was unquestionably U.S. territory, and the U.S. would never cede it to Texas.
 
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This is a map of my version of an independent Texas in 1837 in my timeline Lone Star Republic. Here are the key differences that caused this
  1. Alamo is successfully reinforced with Goliad garrison before battle begins.
  2. The Alamo defenders are able to hold off several waves and Santa Anna is assassinated by Davy Crockett. The shock of Santa Anna's death causes the Mexican forces to panic and lose the battle.
  3. Santa Anna's death causes a Civil War in Mexico between centralists and federalists.
  4. Both Yucatan and Rio Grande secede from Mexico.
  5. Texas is able to expel all Mexican forces at Battle of San Jacinto.
  6. Stephen F. Austin makes a trip to France and secures support of French in an alliance.
  7. France invades Mexico and supports centralists. In return Mexico signs a treaty recognizing Texas, Yucatan, Rio Grande independence.
  8. Mexico cedes California to Texas in order to weaken its power. Done due to Lamar being in negotiations.
If You're curious to learn more about how all this will turn out click the link below watch how our Lone Star Republic grows (may include future expansion).
 
Independent Texas wasn't a going entity as it was, which is why they wanted to join the US. They aren't expanding into Mexico, and they sure as heck aren't expanding into the US. You need a major POD much earlier. At a bare minimum, Spain has to keep the Louisiana Territory, and then lose a larger Texas region afterwards. Any expansion after anything resembling OTL Texas independence is technically possible, but realistically ASB.
 
If the U.S. does not annex Texas, it is very unlikely to acquire the "Mexican Cession", so New Mexico and Arizone would not be "U.S. territories"..
Well OTL Texas territory did include half of new Mexico and lands in Oklahoma, Kansas, Colorado, and Wyoming so on a world where Texas is never annexed then a good portion of your US territory would've never been US to begin with. Though I could see Texas selling parts of its northern territory to the US for money in the early years without other backers to help it get in its feet
 
Could Texas purchase sparsely populated California from Mexico?

if Texas and Mexico kind of become friends post-war.

For example, after the War of 1812, which I think a good case can actually be made that this was in fact the Second American War for Independence, the United States and Britain slowly became friends.

Doesn't happen every time! But it sometimes happens.
 
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Well OTL Texas territory did include half of new Mexico and lands in Oklahoma, Kansas, Colorado, and Wyoming...

Texas claimed a lot of territory outside the eventual state; but they never exercised any effective control of it.

After the U.S. occupation of New Mexico, Texas sent a state militia force there. They tried to occupy Santa Fé and assert authority over the east side of the Rio Grande. But the U.S. forces in New Mexico blocked them, and Texas backed down. Under the Compromise of 1850, Texas abandoned its claims west of the present border in return for $10M in U.S. bonds, which relieved Texas of the debts accumulated during independence.
 
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