Final answer:
The Adams-Onís Treaty, signed in 1819, transferred Florida to the United States and settled border disputes with Spain.
Explanation:
The Adams-Onís Treaty, also known as the Transcontinental Treaty, was signed in 1819 between the United States and Spain. This treaty resulted in Florida being transferred to the United States, settling border disputes, giving the United States control over Florida, and establishing the border between the United States and New Spain.
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