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AHC: smaller Mexican cession - Border runs west from Rio Grande at 35th parallel --

Los Angeles and San Diego remain towns in Mexico.

I guess the portions of California and Arizona south of the 35th , north of Baja and Sonora, will remain Mexico's "Alta California" and a small residual "Nuevo Mexico" will exist between Chihuahua to the south, the Rio Grande to the east, the 35th parallel to the north and the border of Alta California to the west.

How do things change in both Mexico and the USA going forward from there?

What are the biggest urban centers in American California south of San Francisco, and in Arizona?

In the 20th and 21st century, does Alta California become a much more developed and populous Mexican state than Baja and Sonora and Chihuahua?
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