What were the four most significant changes or developments in New Mexico from1690-1848

Imagine yourself a historian of New Mexico and your asked to lecture on the history of New Mexico from 1690 to 1848. What significant changes or developments (political, economic, military, social or cultural). One of the four examples must be the U.S. conquest of New Mexico. Support you thesis with examples from material from Susan Magoffin’s Down The Santa Fe Trail, you can also use outside sources and material from New Mexico: A History by Sanchez, Spude and Gomez.