Popular sovereignty, or sovereignty of the peoples' rule, is the principle that the authority of a state and its government are created and sustained by the consent of its people, through their elected representatives (Rule by the People), who is the source of all political power.
Answer: It was intended to protect American citizens who were in danger in the Cuban Revolution.
The USS Maine is known for having been lost in Habana Harbour on February 15, 1898. The ship was originally sent to the island in order to protect U. S. interests during the Cuban revolt against Spain. The ship blew up and sank, killing nearly three quarters of its crew. Although the cause of the sinking is unclear, popular opinion blamed Spain. This motivated the Spanish-American War later that year.
#4 Andrew Jackson attacked and captured Spanish forts, claiming Florida for the U.S. Monroe signed a treaty with the Spanish which gave Florida to the U.S.
The answer would be an explorer