Editing History of Mexico (section)

===Comanche conflict===
[[File:Comancheria.jpg|thumb|upright=1.4|right|Comanchería, territory controlled by the Comanches, prior to 1850]]
The northern states grew increasingly isolated, economically and politically, due to prolonged [[Comanche]] raids and attacks. The local peoples had not recognized the Spanish Empire's claims to the region, nor did they when Mexico became an independent nation. Mexico attempted to convince its citizens to settle in the region but with few takers. Mexico negotiated a contract with Anglo-Americans to settle in the area, hoping and expecting that they would do so in Comanche territory, the [[Comancheria]]. In the 1820s, when the United States began to influence the region, New Mexico had already questioned its loyalty to Mexico. By the time of the Mexican–American War, the Comanches had raided and pillaged large portions of northern Mexico, resulting in sustained impoverishment, political fragmentation, and general frustration at the inability—or unwillingness—of the Mexican government to discipline the Comanches.<ref name=pekka>{{cite book |last=Hämäläinen |first=Pekka |title=The Comanche Empire |year=2008 |publisher=Yale University Press|isbn=978-0-300-12654-9 |pages=357–358 | url = https://books.google.com/books?id=Fmh0AAAAMAAJ}}</ref>

In addition to Comanche raids, the First Republic's northern border was plagued with attacks on its northern border from the Apache people, who were supplied with guns by American merchants.<ref name='Jacoby, Karl "Shadows at Dawn"'>{{cite book|last1=Jacoby|first1=Karl|title=Shadows at Dawn|date=2008|publisher=The Penguin Press|isbn=978-1-59420-193-6|url=https://archive.org/details/shadowsatdawnbor00jaco}}</ref> Goods including guns and shoes were sold to the Apache, the latter being discovered by Mexican forces when they found traditional Apache trails with American shoe prints instead of moccasin prints.<ref name='Jacoby, Karl "Shadows at Dawn"' />