In 1-2 short sentences, compare the motivations for territorial expansion between the Roman Empire under Trajan and the Byzantine Empire under Justinian I.(4 points)

The Roman Empire under Trajan sought territorial expansion to consolidate power, enhance trade, and spread Roman culture across a vast region. In contrast, the Byzantine Empire under Justinian I aimed to restore the former glory of the Roman Empire, driven by a desire for political legitimacy and religious unity through reclaiming lost territories in the West.