During the early years of exploration in the 15th century which two European countries began sea voyages and colonization?

During the early years of exploration in the 15th century, Portugal and Spain were the two European countries that spearheaded sea voyages and colonization. Portugal, under the leadership of Prince Henry the Navigator, focused on exploring the African coast and finding a sea route to India. Meanwhile, Spain, driven by figures like Christopher Columbus, aimed to discover new trade routes and territories, leading to the significant exploration of the Americas. These efforts marked the beginning of European global exploration and colonization.