China, North Korea, South Korea
I think, the excerpt "You really never understand a person until...you climb into his skin and walk around it." Atticus made an attempt to understand the situation of Cunnigham and learn of his actions. The classmate of Cunnigham contributes the ill manners of Walter because of his poor economic status.
When the Persians were threatening the freedom of the Greek city-states through invasion. This united the city-states, set their differences aside, and fought valiantly for Greek freedom
