Final answer:
The majority of Americans who settled in Mexico in the 1820s were predominantly from southern states and brought enslaved people with them.
Step-by-step explanation:
The majority of Americans who settled in Mexico in the 1820s were predominantly from southern states in the United States and were seeking new opportunities and land. Many of these American settlers brought enslaved people with them, and their discontent increased when the Mexican government abolished slavery in 1829.
The American settlers in Texas distrusted the Mexican government and wanted Texas to be a new U.S. slave state, leading to tensions between Americans and Mexicans in the region.
Although the Mexican government tried to accommodate the American settlers by treating enslaved workers as indentured servants, the majority of Americans in Texas held beliefs in American racial superiority and regarded Mexicans as dishonest, ignorant, and backward.
They also had a dislike for Roman Catholicism which was the prevailing religion in Mexico.
In the American Southwest, the Treaty of Guadalupe Hidalgo in 1848 granted U.S. citizenship to around 75,000 Hispanics who were living in the region at the time. Despite promises made in the treaty, many Californios, Mexican citizens residing in California, lost their lands to White settlers who forcibly displaced them.