> Both Marco Polo and the Moroccan explorer Ibn Batuta wrote of seeing huge seagoing vessels in their visits to the East. Some experts believe the treasure ships Zheng sailed were 400 feet long, or five times the size of Columbus’ ships, with 70,000 square-foot decks, though those numbers remain in debate.
Taking it at face value, it appears some other force of history in their culture annihalated all evidence of an technologically advanced civilization and allowed the region to be exploited by the Portuguese and British without even a land invasion. If this mega ship tech existed in the region, what did the invaders have that prevented them from being repelled?