First month 28) (JiMao, February 22, 1819, Spanish Florida was ceded to the United States.

Florida, an area of ​​58,664 square miles (151,939 square kilometers) of the capital of Tallahassee. Location close to the population centers of the Western Hemisphere, the geographical center and the Western Hemisphere, (L $ dj��.c��m) it not only controls the entrance to the Gulf of Mexico and, more importantly, it is located between North and South America and Mediterranean Europe strategy, history to be ground. Florida play a European competition for power, an important role in an attempt to control the New World in 1565, found that in the State of the northeast coast of St. Augustine, it is the oldest European colony, and later became the first boundary of the United States .
1810, the United States invade Spanish Florida west, 1818, and sent troops to invade and occupy the eastern Florida, the U.S. threat of force, to force Spain to make concessions. February 22, 1819, U.S. Secretary of State Colin Adams Adams - the Dionisi Treaty "signed with Spain, the United States envoy, Don Luis Dionisi, Spain to Florida was ceded to the United States. In 1845, Florida became the 27th state in the United States.