North Mexico

The Confederation of North Mexico, or the Confederación del Norte, is a country in North America which is a confederation of autonomous republics and not as autonomous territories.

History
In the 1830s and 40s, a lot of revolutions have been happening in the declining First Mexican Empire, like the Texan Revolution, the Yucatecan Revolution, and the Californian Revolution. After they all gained independence, in this alternate universe the US doesn’t just annex some of them, so they remained independent. After a few years of peace, a coup happened in the now smaller Mexico, which made the Mexicans want to reconquer all the countries that declared independence. The countries who just got independence were worried that they might not be strong enough to beat the Mexicans, so they all formed an alliance, except the Central Americans, who already had help from Peru and New Granada (modern day Colombia and Panama). In 1850, the Mexicans launched a surprise invasion of Texas, the strongest country in the alliance. They hoped that if Texas capitulated, the alliance will become too weak and become easy to conquer. But the plan backfired, as troops from all around the alliance came and helped. They pushed back the Mexicans, all the way to the Panuco River, and Mexico began negotiating peace. At the peace treaty, it was decided that Mexico gets to keep all its land except for the state of Chihuahua, and in return recognize the independent nations, and soon to be confederation. Also, since Texas didn’t join the US and therefore didn’t become a slave state, the American civil war would be more one-sided and the Union will easily beat the Confederates.

In 1914, World War One broke out, and North Mexico stayed neutral. But, in 1917, the Germans sent the Zimmermann telegraph to North Mexico instead of Mexico since in this alternate universe Mexico doesn’t have a border with the US. But, the North Mexicans declined.