Some factors that best explain the success enjoyed by the 16th century conquistadors in conquering Native American empires include riding horses, wearing helmets, advanced weaponry, intimidation, strategy, and disease. Riding horses allowed the conquistadors to move fast and carry their weapons with them, causing fear in the Natives and their defeat. The conquistadors wore helmets that helped protect their heads from the Native American retaliation; this is a very vulnerable part of the body when not protected. Advanced weapons such as guns were terrifying to the Native Americans instilling fear in them and put them at a disadvantage in fighting off the conquistadors. Conquistadors were also armed with very perfected swords that were much