In May 1918, as American eyes were fixed on sending an Army to France and the Western Front, the German U-boat U-151 was off Cape May bringing the Great War to the East Coast. On the 25th, the U-boat stopped two American ships, and after taking their crews on board, the Germans had placed explosives on them, saving their torpedoes. At this time a third American ship, the schooner Edna, cleared the mouth of Delaware Bay.

Her captain, C.W. Gilmore, recounted, “We heard a gun fired and a little later a shell struck in the water about a half…