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.

Category: PRESIDENTIAL PETS 
Clue: As a warning to Congress, president James Garfield named his dog this
veto

Category: CASTLES 
Clue: The name of this large home located in Aberdeenshire means "the majestic dwelling" in Gaelic
balmoral castle

Category: U.S. HISTORY 
Clue: Of 9 "wars" in which the U.S. has been actively involved, these 2 lasted the longest

vietnam and the revolutionary war