Battle of Ninety Six
The Battle of Ninety Six brought some Revolutionary War to the state of South Carolina. The upper and lower echelons of the American army helped defeat Loyalists at 96, and left those who were loyalists from the beginning upside-down.
Check Your Answers
For the meta, you don't need most of the answer, just "the beginning."
Those beginnings should be turned "upside-down."
The puzzles belong either to the "upper" or "lower" set of barrels. That should indicate which type of letter you want.