Inter caetera in the context of "Rex Catholicissimus"

A colonial empire is a state engaging in colonization, possibly establishing or maintaining colonies, infused with some form of coloniality and colonialism. Such states can expand contiguous as well as overseas. Colonial empires may set up colonies as settler colonies.

Before the expansion of early modern European powers, other empires had conquered and colonized territories, such as the Roman Empire in Europe, North Africa and Western Asia. Modern colonial empires first emerged with a race of explorationbetween the then most advanced European maritime powers, Portugal and Spain, during the 15th century. The initial impulse behind these dispersed maritime empires and those that followed was trade, driven by the new ideas and the capitalism that grew out of the European Renaissance. Agreements were also made to divide the world up between them in 1479, 1493, and 1494. European imperialism was born out of competition between European Christians and Ottoman Muslims, the latter of which rose up quickly in the 14th century and forced the Spanish and Portuguese to seek new trade routes to India, and to a lesser extent, China.

During the Age of Discovery, the Spanish Empire undertook several expeditions to the Pacific Northwest of North America. Spanish claims to the region date to the papal bull of 1493, and the Treaty of Tordesillas signed in 1494. In 1513, this claim was reinforced by Spanish explorer Vasco Núñez de Balboa, the first European to sight the Pacific Ocean, when he claimed all lands adjoining this ocean for the Spanish Crown. Spain only started to colonize the claimed territory north of present-day Mexico in the 18th century, when it settled the northern coast of Las Californias.

Starting in the mid-18th century, Spain's claims in the Pacific Northwest began to be contested by the British and Russians, who established fur trading posts and other settlements in the region. King Charles III of Spain and his successors sent several expeditions from New Spain to present-day Canada and Alaska between 1774 and 1793 to strengthen the Spanish claims. These efforts would eventually come to naught when Spanish claims in the region were ceded to the American government in the 1819 Adams–Onís Treaty.