Final answer:
The outcomes of the Mexican-American War that have become part of the US legacy include the annexation of Texas, the cession of Mexican territory, and the establishment of the Rio Grande as the border.
Step-by-step explanation:
The outcomes of the Mexican-American War that have become part of the US legacy include:
- Annexation of Texas, which led to the addition of a new state to the Union
- Cession of Mexican territory, including the Alta California and New Mexico territories, which eventually became several US states
- Establishment of the Rio Grande as the border between the US and Mexico, which settled the boundary dispute between the two countries
These outcomes of the war resulted in significant territorial expansion for the United States and set the stage for future tensions and conflicts between the North and South over the issue of slavery.