Throughout history, we have seen the United States expand its territory over other countries, which are known as US territories. The way the US expands its territory is called Imperialism. The Spanish American was started because of imperialism, Cuba wanted independence and the US got involved. Imperialism as caused a lot of wars throughout history. People joined World War 1 for the power you could say. The United States tried to be neutral at first but then they didn't want to be left out.
