Harden 1 Indigo Harden Mrs. Madden AP World History September 17, 2014 The Declines of the Roman Empire and the Han Empire The Roman Empire and the Han Empire were two of the most powerful and influential civilizations to ever exist. Despite their sturdiness, these empires did not last forever. The declines of the Roman Empire and the Han Empire were severe and had irreversible effects. Both empires ended due to several political, economic, and military factors. Their declines were also different in various ways.