Question: Botiller v. Dominguz was a decision by the United States Supreme Court that dealt with a region of the southwestern United States that was the third largest acquisition of territory in US history, with what being the largest? 
Sentence (from "Mexican Cession"): The Mexican Cession of 1848 is a historical name in the United States for the region of the modern day southwestern United States that Mexico ceded to the U.S. in the Treaty of Guadalupe Hidalgo in 1848.
Relevant evidence: Yes