How did Portugal have such a large influence on Europe's commerce?

How did Portugal influence European commerce?

As the second half of the fifteenth century unfolded, Portugal created a complex trade structure connecting India and the African coast to Portugal and, then, to the north of Europe. ... This trade was based on such African goods as gold, ivory, red peppers, slaves and other less important goods.

Explanation:

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could you go a bit more in depth with you question? it's quite hard to understand. as soon as you do that i will be glad to : )