What agreement was between the United States and Spain in 1819 that ceded Florida to the U. S. and defined the boundary between the U. S. and Spain?
Adams-Onis Treaty
Treaty of Ghent
Treaty of Paris
Treaty of Versailles

The Adams–Onís Treaty (Spanish: Tratado de Adams-Onís) 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.

Explanation:

they thoght they were going to nuke each other

this is a good question! i'll do some research and come back when i have the answer!