試下背先
European were in great demand of silks,pocelain and spices from Asia.But in the Middle Ages,the land route to the East was controlled by the Musilms and the Itanlian merchants.As a result,the Western Europaen countries wanted to fing a new sea route to the east so that they could buy Asian products at a lower price.
Some European countries wanted to gain new land and built empires.