Answer:
The Union was basically in control of more land than the confederates and they had a bigger army than the Confederates.
Answer: Image result for how did the united states justify imperialism
Americans justified imperialistic behavior by: Claiming that it was their responsibility. Americans and Europeans both claimed that it was their responsibility as superior races to uplift, civilize and Christianize native peoples. This was known as the White Mans Burden and was based upon the ideas of social Darwinism.
Right to trial by jury
Protection from cruel and unusual punishment
Right to bear arms