Which nation was the most powerful trade center in Eastern Africa?

Zimbabwe

The most powerful trade center in eastern Africa in the 1400s was Zimbabwe.

Hope it helps! :)

yes based on alexanders actions he deserved the title of "the great". his empire covered about 3,000 miles and he was able to establish the empire over a 13 year period of time. he was able to conquer many different places. he also defeated the persians. he conquered egypt and developed a city and named it after himself.