What impact did Imperialism from the 1890's to the early 1900's have on American identity?

Answer 1

Americans came more to realize that they were a force to be reckoned with not just in the Americas but in the world, that they were a major power like, say; Germany or France.

Answer 2

What makes you think that imperialism had an impact on the American identity as opposed to the other way around? Imperialism is a policy, and a policy is an expression of identity...