Simply put, they were fighting an unpopular war that was against an enemy we basically couldn't see. We were fighting an enemy who would hide among the Vietnamese civilians. Many of the soldiers we were fighting were untrained farmers, however the fact they would not come out as soldier made it harder to root them out. They also knew the land better than us so they had the terrain to their advantage. The Vietnamese were just guerilla fighters, who we had issues with fighting because we could never tell who was an enemy. Often times, civilians would die due to the choices of these fighters, causing the Vietnam war to be very unpopular back at home. So our soldiers who had no morale to boost them back at home, were fighting an invisible enemy and then coming back home and being booed fr what thy did.
Answer B.
They carried messages between different parts of the empire
The runners in the Inca society were called Chasqui runners and were young men used to bring messages by running between different parts of the Inca Empire.
Answer:
In the case Plessy v. Ferguson, the Supreme Court determined that segregation was allowed as long as the facilities were "separate but equal." This was overruled with Brown v. Board of Education
With Brown, African-Americans were given civil equality but were still treated as second class citizens and were thus not socially equal. So, social equality is how people actually treat each other while political equality is how they are treated by the law.