Have you ever played the game Battleship? To sink your opponent's ships you have to guess where the ships lie on a grid of numbers and letters. It isn't easy to sink a battleship just by guessing, even in a game.
Well, what if you already knew that your battleship had sunk, but had to guess who sank it? That is what happened to the United States on February 15, 1898, when an explosion sank the U.S.S. Maine in Havana, Cuba.