HISTORY QUESTION

What were some of the specific wars or conflicts that took place due to American expansionism? Why did we engage with these other countries (for example, due to our national defense or economic/political/military interests?) Do you think there is a risk that comes with becoming too involved in the affairs of other countries? 

MINIMUM OF 350 WORDS WITH AT LEAST 2 SOURCES MLA FORMAT. NO PLAGIARISM, MUST BE SPECIFIC.