Answer:
After the discovery of America by Cristobal Colon in 1492, the Spanish Empire began to colonize the territory, establishing settlements in different regions of North, Central and South America. Thus, in North America it expanded through the current territories of Florida and the Southwest of the United States, from California to Texas.
In all its colonies, the natives were exploited by the Spanish through the encomienda system, by which the Spanish established settlements and work areas, in which they exploited natural resources through free native labor, which were paid with "education" and "Catholic evangelization", in many cases dealing with disguised slavery.
A new concept that became popular with department stores was using credit cards, and buying on credit: it allowed the users t posses good they cannot afford and on the other hand gave more revenue to the shops and they could charge interest.
On March 22, 1972, the Equal Rights Amendment is passed by the U.S. Senate and sent to the states for ratification
Brown v. Board of Education is important because it marked an important victory in the struggle for racial equality.