In what ways did U.S. expansion in the 1800s & the early 1900s resemble European expansion? In what ways did it differ?

Much of our expansion in the 1800's was conquest and
settlement rather than colonization.  Manifest Destiny and our westward movement
systematically depopulated Native lands in favor of permanent white settlements.  This
was similar to earlier British policy of colonization in the 1700's, but different from
the actions of empires in the later 1800s.

By the late
1800s and early 1900s we had become an empire, much the same as the European powers,
where we had taken colonies like Guam, Puerto Rico and the Philippines for both their
strategic location and their resources, but not as colonies where we would settle large
numbers of white Americans.  This too was similar to how the European powers acted at
that time.