Setting the scene
Spain ceded Florida to the United States in 1821 after Andrew Jackson's invasions and Adams-Onís Treaty; planters pushed Seminole removal wars while Tallahassee replaced St. Augustine as capital for a cotton frontier edging the Everglades.
What happened
Florida became a state on March 3, 1845, the twenty-seventh star on the flag, admitted alongside Iowa in the last expansion before the Mexican-American War reshaped the map.
Why it still matters
Seminole wars and plantation economy shaped its early years; Florida later grew through railroad barons, retirement migration, space launches at Cape Canaveral, and tourism that made Orlando and Miami global gateways despite hurricane and climate risks.
Background
Seminole wars and plantation economy shaped its early years.