USA Trivia Answer #36

Who said this:

“The fate of unborn millions will now depend, under God, on the courage and conduct of this army. Our cruel and unrelenting enemy leaves us only the choice of brave resistance, or the most abject submission. We have, therefore, to resolve to conquer or die.”

Answer: 

Gen. George Washington in an address to the Continental Army before the Battle of Long Island (27 August 1776)