Which country claimed much of southwestern north America in 1750 and 1764?

In 1750 and 1764, Spain claimed much of southwestern North America. This territory included present-day California, Arizona, New Mexico, Texas, and parts of Colorado and Nevada. Following the Seven Years' War, the Treaty of Paris in 1763 resulted in Spain ceding Florida to Britain but retaining its claims in the southwest. Spanish exploration and colonization efforts were significant during this period, contributing to their influence in the region.