The Gadsden Purchase was a treaty signed by James Gadsden, the U.S. Minister to Mexico, and General Antonio de Santa Anna, the president of Mexico on December 30, 1853 in Mexico City. It was an Agreement between the United States and Mexico to give a 29,670 square mile portion of Mexico in exchange for $10 million.
I’m pretty sure it’s unskilled immigrants :))
One of the successes of the Reconstruction era was the Thirteenth, Fourteenth, and Fifteenth amendments.
The 2 nations that emerged as superpowers after WW2 were the Soviet Union and the U.S.