claiming land in the age of exploration was a big deal to Europe because England, Spain, and France were all fighting for the glory of owning the most property over seas. For those who wanted freedom from the Kings strict rules on religion and speech, this was a gateway for them to "claim land for England" but also a path to their own freedom.
The African empires of Kush and Aksum resembled later empires in Africa as they grew powerful through trade. This is so they began to sell resources and in addition to that handmade woven goods were also produced and sold.