Answer:
The Treaty of Guadalupe Hidalgo
explanation
The Treaty of Guadalupe Hidalgo, that brought an official end to the Mexican-American War (1846-1848), was signed on February 2, 1848, at Guadalupe Hidalgo, a city north of the capital where the Mexican government had fled with the advance of U.S. forces.
The Louisiana Purchase helped to double the size of the country and provided control of the Mississippi River. The Louisiana Purchase was a massive land purchase by the U.S. from France under President Thomas Jefferson's administration.
So we could have freedom from the British
Answer:
It allowed emperors to justify conquering new territories. It inspired merchants to spread European ideas about democracy.