They were tasked with protecting the movement of trade goods. They also kept defense of the northern and western frontier against Indian and Mexican incursions, defense of the coast against Union invasion, and suppression of Union loyalists within Texas.
An ethnic genocide, for one.
This means that a certain ethnic group was basically wiped out in that country/state. In the Holocaust, it was the Jews.
Hope this helps! Brainliest is always appreciated!
D.) I'm not sure but the early 20's was also including the Harlem Renaissance and most pictures were abstract. 'm not sure about my answer.