These voyages had little immediate effect, however; the Mongol Empire collapsed almost as quickly as it formed and soon the route to the east became far more difficult and dangerous. The Black Death of the fourteenth century also blocked travel and trade. The land route to the East was always to be too long and difficult for profitable trade and it was also controlled by Islamic empires that had long battled the Europeans. The rise of the aggressive and expansionist Ottoman Empire further limited the possibilities for Europeans. | These voyages had little immediate effect, however; the Mongol Empire collapsed almost as quickly as it formed and soon the route to the east became far more difficult and dangerous. The Black Death of the fourteenth century also blocked travel and trade. The land route to the East was always to be too long and difficult for profitable trade and it was also controlled by Islamic empires that had long battled the Europeans. The rise of the aggressive and expansionist Ottoman Empire further limited the possibilities for Europeans. |