Answer:
A strong and organized empire should also be able to have a strong and very organized army. This means they would most likely populate their frontier with settlers and station armies there to defend the frontier. The army would be a professional one made from highly skilled and dedicated soldiers that would be able to repel any opposing threat.
Answer:
The anti-imperialists opposed the expansion because they believed imperialism violated the credo of republicanism, especially the need for "consent of the governed".