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: U.S.A. 
Clue: Horseshoe Bend National Military Park in Alabama marks the site of this Indian war's last battle

SOLUTION: creek indian war

PROBLEM: Category: AMERICAN HISTORY 
Clue: On June 21, 1982 he was found not guilty by reason of insanity in the shooting of President Reagan

SOLUTION: john hinckley

PROBLEM: Category: POPE-POURRI 
Clue: During the reign of Alexander III, it was established that the pope would be elected exclusively by this body

SOLUTION:
the college of cardinals