If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Main content
About 2,300 years ago, the Persian Empire covered over two million square miles and held nearly half the world’s population. Whatever Alexander tells you, this was the world’s first great empire. Created by World History Project.
Sort by: