This is one of the series of Time-Life Books about "the Old West." I love the Time-Life books because of their illustrations, photos, and maps. And they are well enough written to cover the subject presented. This one is about "the Spanish West," about the three main Spanish colonies north of Mexico--Texas, New Mexico ( including Arizona) and California.
The story begins with the audacious Spanish explorations into what is now the American Southwest, especially Coronado's expedition of 1540-42. Coronado was looking for the mythical Seven Cities of Cibola. He never found them but he did find the Pueblo communities and conflict between the Spanish and Native Americans was a result. It was in 1609 that the Spanish founded Santa Fe and New Mexico would become Spain's most successful colony north of Mexico. Much of the colonization was driven by the Catholic Church, setting up missions and converting Native people to Catholicism ( while they retained much of their "pagan" beliefs and customs ).
In 1680, the most successful war against the whites by Native people was carried out by the Pueblo Indians under the leadership of a man known as "Pope." They forced the Spanish to evacuate Santa Fe--and the Spanish would not return until 1692.
Texas became another colony with missions and the imposition of the Spanish culture on the Native people. In 1718, the mission of San Antonio was founded, its chapel becoming known as the "Alamo." But in Texas the Spanish population growth was extremely slow. This was due to one main reason: Native hostility in Texas. The Spanish there were threatened by not one but two warlike nomadic tribes--the Apaches to the west and the Comanches to the north. In the Battle of Red River in 1759, Comanches and allied Plains Indians ( many with firearms provided by the French) decisively defeated a Spanish force sent to punish the Comanches for their raids. By the end of Spanish rule (before Mexican independence in 1821), the decision was made to permit Americans to settle in Texas and provide a buffer against the Comanches for Mexican settlement farther south. We know how that ended--with the Americans fighting the Mexican government and creating an independent republic in Texas in 1836.
The third Spanish colony north of Mexico was California. A great chain of missions was extended from San Diego 650 miles north to San Francisco between 1769 and 1823. Most of the Indian tribes were peaceful and became converted--and provided the labor force for the missions. Ranches were established and cattle-raising became the main industry. The population of the Californios remained small but they had a prosperous life enjoying the mild climate. They certainly also had a lot of servants from the subjected Native population. They traded with the Americans and others who came by ship, but it was surely a sign of things to come as, increasingly, Americans came to stay.
With Texas gaining statehood in 1845, Mexico and the USA moved toward war. This is the last part of the story--the Mexican-American War of 1846-48. In that war, Santa Fe was captured by an American army, California was also seized, and Mexico City itself fell to US forces after a great battle. In the Treaty of Guadalupe-Hidalgo, California and New Mexico were ceded to the USA and the border with Texas was recognized as being on the Rio Grande. Mexico lost 1/3 of its territory and, as a consolation, received a payment of $15 million. The US also assumed $3,250,000 in debts owed by Mexico to American citizens.
Was it the end of "the Spanish West?" Not at all. Spanish culture, food, religion etc. remains. In fact, and I just checked, as of 2019, Hispanics are 49% of the pop. of New Mexico, California, 39%, Texas, 39% and Arizona, 31%. In 1848, there were 5,000 Hispanics in California. Today, there are over 15 million. The Spanish West not only lives on but it is stronger than ever.