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The lack of means to establish a ship's position in the open seas. There were primitve means for that and the Vikings had been good in using them, ennabling their ships to travel from Scandinavia to places like Iceland, Greenland and Newfoundland - and back to base. But the use of navigational instruments was not common elsewhere in Europe, causing most ships to stay close to the coast. This did not so much 'prevent' exploring, but it did limit its scope. The Portuguese for instance had been exploring ever further south along the west African coast during the Middle Ages.
Missionaries
union army
There were many explorers looking for the northwest passage. One explorer you would probably be familiar with is Christopher Columbus. The purpose was to trade with china and india. But many countries had taken over most of teh trade routes.
The Oregon trail.
Since the West Indies comprises of several countries, you need to visit the embassy or consulate of the particular country you are interested in. Most of these can be found online.
America
Most European Union countries are in the west of Europe.
west asia
austrlia and countries on the west coast of s.america
this is because they are excited and interested. most likely they are exploring their territory or they are around their owner, and therefore are happy.
they have a democracy
They are cheap in most west African countries
most likely because of the people in it
they did most of it by boat
they did most of it by boat
west