Question

Under what treaty did Spain finally give up Florida to the U.S.

Answer 1

The Adams–Onís Treaty of 1819, also known as the Transcontinental Treaty, the Florida Purchase Treaty, or the Florida Treaty, was a treaty between the United States and Spain in 1819 that ceded Florida to the U.S. and defined the boundary between the U.S. and New Spain.

Answer 2

Adams–Onís Treaty of 1819