What Time, and Winds, Would Reveal.

Kublai Khan's 4,000+ vessel Yuan Dynasty invasion fleet:

Explorers found the 20-meter-long shipwreck some 25 meters off the coast of Nagasaki using ultra-sound equipment, buried about a meter deep in the sandy seabed. Archeologists believe the ship dates back to 1281, and was part of a 4,400-vessel fleet that China's Mongol rulers deployed in a thwarted attempt to invade Japan.

The discovery of the ship's well preserved and mostly intact 12-meter-long keel "could go a long way to helping researchers identify all the characteristics of the 20-meter warship," CNN reported, citing the head of the research team that made the discovery.
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According to Japanese legend, two typhoons--known as the Kamikaze--that occurred seven years apart in the 13th century twice saved Japan from Mongol invasion by "destroy[ing] two separate Mongol invasions fleets so large they were not eclipsed until the D-Day landings of World War II," CNN reported. China was not so spared, however, and was ruled by the Mongol Yuan Dynasty from 1271-1368.