Studies by Dr. Kenneth and Mamie Clark in the 1940s which was known as the doll test was cited by the Supreme Court in the decision which overturned separate but equal doctrine which was established in 1954 in the case of Plessy v. Ferguson.
The doll test was aimed at studying the psychological effect of segregation on African American children in which children between the ages of 3 to 7 were asked to identify the dolls they preferred and majority of them picked the white and attributed good qualities to it.
During the case between Brown and the Board of Education of Topeka, this experiment was cited by the Supreme Court in delivering their verdicts in favour of Brown prohibited segregation of black children in the education system.
Abolitionist John Brown leads a small group on a raid against a federal armory in Harpers Ferry, Virginia (now West Virginia), in an attempt to start an armed slave revolt and destroy the institution of slavery.
This is because that particular country has special rights regarding resources produced/available in the particular land hence they can decide to charge fees for economic activites.
A country would want to get a larger military to overpower or to stand ground against other counties. "Problems" that this could cause to a nation is to be over militarized and not care about its citizens, problems to surrounding nations is that they would feel threatened by a larger military.
