Which treaty, concluded in 1819, ceded Florida to the United States in exchange for dropping U.S. claims to Texas?

• A. Treaty of Paris
• B. Treaty of Ghent
• C. Pinckney's Treaty
• D. Adams-Onis Treaty

Answer: (D)

Recognizing which treaty settled territorial changes between the United States and Spain in the early 19th century. The Adams-Onís Treaty, concluded in 1819, ceded Florida to the United States and, in return, the U.S. relinquished its claims to Texas. It also established the boundary line between U.S. and Spanish territory across the continent, helping to prevent future border disputes and paving the way for westward expansion. The other options don’t fit this specific exchange: the Treaty of Paris ended the American Revolution, the Treaty of Ghent ended the War of 1812, and Pinckney’s Treaty dealt with navigation rights and boundaries with Spain in the 1790s, long before Florida was ceded. Therefore, the Adams-Onís Treaty is the correct one.