Answer:
Manifest destiny was a widely held cultural belief in the 19th-century United States that American settlers were destined to expand across North America. There are three basic themes to manifest destiny: The special virtues of the American people and their institutions.
The Monroe Doctrine was a United States policy that opposed European colonialism in the Americas. It argued that any intervention in the politics of the Americas by foreign powers was a potentially hostile act against the United States. It began in 1823; however, the term "Monroe Doctrine" itself was not coined until 1850.
Originally the Spanish territory of La Florida, and later the provinces of East and West Florida, it was ceded to the United States as part of the 1819 Adams–Onís Treaty. It was governed by the Florida Territorial Council .
I hope this helps, this is from some of my notes that i've taken.