Final answer:
After the Louisiana Purchase, Spain continued to control significant territories in the current United States, including Florida and large parts of the southwest.
Step-by-step explanation:
Even after the Louisiana Purchase in 1803, Spain still controlled a large amount of land in what is now the United States. The territories that Spain controlled included areas that would later become states such as Florida, as well as vast regions in the southwest that encompass parts of modern-day Texas, New Mexico, Arizona, and California. It wasn't until the Adams-Onís Treaty of 1819 that Spain ceded Florida to the United States, and it wasn't until the Mexican War of Independence that territories in the southwest transitioned to Mexican control before eventually being ceded to the U.S. following the Mexican-American War.