The Teller Amendment is the correct answer.
After the end of the Spanish-American War, Senator Henry Teller of Colorado introduced the Teller Amendment in 1898, that the United States conquered Cuba until 1902, and did not violate the Teller Amendment to annex the Island. And the U.S. would help Cuba to gain independence and then withdraw all its troops from the country. This amendment was a part of President Mckinley's to resolve the issues between U.S and Spain. The United States promised to allow Cuba to be administered by its people, after assisting them to gain some stability and smooth over the dispute with Spain.
Common sense is significant because it convinced colonists that the United States should be independent from Great Britain! :)
In 1803 Robert Livingston and James Monroe were sent to France to negotiate the purchase of the Louisiana Purchase. Originally the two met set out only to purchase New Orleans and the surround territory, however, by the end they eventually purchased the massive track of land that extended beyond the Mississippi River which greatly expanded the size of the United States.
