Imperialism in the Past.

In the past the U.S. did practice some pretty obvious cases of imperialism.  When the U.S. became involved with places like the Philippines and Cuba, not only did they help with the revolutions, abut they wanted full influence over the countries after they were freed.   This is a clear case of imperialism for it was a strong country (the U.S.) trying to take over weaker countries (Cuba and the Philippines).  Although in the end the U.S. influence ended up failing, the U.S. did try and expand itself for military and economic reasons just as the Europeans did in Africa and Asia.