At the end of the Mexican-American War (1846-1848).
The US claimed what became the New Mexico territory during the Mexican-American War. It was primarily a linear western extension from Texas.
The Comanches lived on the prairies, plateaus, and plains of western Texas. Their territory was named Comancheria, it covered parts of Mexico, Texas, Kansas, Oklahoma, Colorado, and New Mexico.
The 5 fronts of the Civil War in which Texas was directly involved were: Territory of New Mexico; Confederate Arizona; Indian Territory and Kansas; Missouri; Western Louisiana.
The US claimed what became the New Mexico territory during the Mexican-American War. It was primarily a linear western extension from Texas.
Texas Territory
Arizona, New Mexico and Indian Territory
The Comanches lived on the prairies, plateaus, and plains of western Texas. Their territory was named Comancheria, it covered parts of Mexico, Texas, Kansas, Oklahoma, Colorado, and New Mexico.
The territory of Texas.
Texas Territory
The whole territory of Texas.
The U.S. after capturing Santa Ana, Mexican army captain or something, and they asked him to give several territory (Texas, New Mexico, etc.) If he wanted to be free. So he did.
It was a Mexican territory until the Texas Revolution (1835-1836)