How is a "civilization" different from an "empire"?

An empire is an extensive group of states or countries under a single supreme authority, formerly especially an emperor or empress. ... An empire is different from civilization because its an excessive group while civilization is organization based.

Explanation:

answer; andrew jackson approved nullification by signing it into law,and john calhoun opposed it saying it was unconstitutional;

“the iliad” (gr: “iliás”) is an epic poem by the ancient greek poet homer, which recounts some of the significant events of the final weeks of the trojan war and the greek siege of the city of troy (which was also known as ilion, ilios or ilium in ancient times).