TASK DEFINITION: You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.
PROBLEM: Category: WOMEN WRITERS 
Clue: Mary Chesnut's take on this U.S. war was part of a Ken Burns TV documentary

SOLUTION: the civil war

PROBLEM: Category: INITIALLY YOURS 
Clue: One of the founders of the NAACP was this sociologist & writer of "The Souls of Black Folk"

SOLUTION: w.e.b. dubois

PROBLEM: Category: U.S. GEOGRAPHIC NICKNAMES 
Clue: Appropriately enough, this New York metropolis is "Bison City"

SOLUTION:
buffalo