What if the American-French Quasi-War of 1798-1800 escalated into a declared war?
Short answerThe United States would probably join Britain and the Second Coalition against France and Spain.
NotesA declared war in 1798 would likely pull the United States toward Britain and the Second Coalition rather than leave the naval conflict semi-official. That alignment would add American maritime power to a coalition already including the Holy Roman Empire, Russia, the Ottoman Empire, Naples, Portugal, and Sardinia against France and Spain.