Why were the roads so important to the Inca?

The Inca road system formed a network known as the royal highway or qhapaq ñan, which became an invaluable part of the Inca empire, not only facilitating the movement of armies, people, and goods but also providing an important physical symbol of imperial control.

so they could trade goods easily

Explanation:

so they could trade goods easily

the viking voyages took place during the middle ages, which was about this time. 500 to 1350. the viking voyages took place during the middle ages, which was about this time.