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: BACH'S CANTATAS 
Clue: A cantata for the Leipzig town council inauguration is titled "Wir Danken Dir, Gott" or we do this, God
thank you

Category: THE CONTINENTAL CONGRESS MET HERE 
Clue: For less than 2 months in 1784 this New Jersey city, named for a businessman, was our capital
trenton

Category: TANK ARRAY 
Clue: The first successful attack using tanks occurred during this war at the Battle of Cambrai

world war i