Many slaves were brought to Brazil due to the sugar economy,
which is the primary source of income in Brazil. They also used slaves when the
Portuguese colonizers had discovered gold and diamond deposits in Brazil. Because
of this, Portugal had sent slaves to work on the fields and mines under the Portuguese
colony.
The Cold War was really just a disagreement between the Soviet Union and the US about economic systems. Yeah, they had the Arms Race, but they really were just competing with each other to see who had more. Like, for example, in the Cuban Missle Crisis, the Soviet Union put the missiles there because Cuba was close to the US, but eventually, the Soviet Union took them out, as long as the US took their own missiles out too. So technically, yes it's true.
This reprints nationalism because Robert is willing to die for something he believes in, he is proud of his home, he will fight for it.