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
AP.USH:
KC‑7.3.I (KC)
,
Unit 7: Learning Objective A
After more than one hundred years of isolationism, at the end of the nineteenth century the United States became an imperial power. 
Sort by: