??? what the question besides for
"Can someone PLZ HELP ME"
Florence was the most famous. :)
The United States feared that if communism was successful on Vietnam, the rest of the countries that border it would soon turn into communism and those other countries that border that new communist country would also be converted to communism and so on. This is called the "domino theory" and made the United States to send troops to prevent the theory from happening.
Some reasons were that Native Hawaiians were against U.S. annexation, and the controversy of how US marines used force against the Queen Liliuokalani of Hawaii (held her at gunpoint) and also the fact that President Grover Cleveland himself was against annexation.