The most powerful pirate in history was a woman who was born into poverty in Guangzhou, China, in the early 1800s. When pirates attacked her town and the captain took a liking to her, she saw a way out. Zheng Yi Sao agreed to marry him only if she got an equal share of his business. When her husband died six years later, she took command of the fleet. Over the next decade, the pirate queen built a fleet of over 1,800 ships and 70,000 men. On land and sea, Zheng Yi Sao's power rivaled the emperor himself. Time and again, her ships triumphed over the emperor's ships. When she was ready to retire, Zheng Yi Sao surrendered -- on her own terms, of course. Even though there was a price on her head, she was able to negotiate her freedom, living in peace and prosperity for the rest of her days.