Spanish expansion was indicated by Christopher Columbus arrival in America. He was exploring the southern and western America in their quest of gold. However, to begin with, Columbus, a Portuguese, ambition was to discover a new trade route to China so that he would receive financial backing for the Spanish merchants by his agreement with King Ferdinand and Queen Isabella. Since the morale of the Spanish people were very high at that point in time, a new trade to China would be an expression for the crusading mentality of reconquista, of carrying Christianity to the people of Asia. Nonetheless, Columbus failed to find the new route to China, but he unexpectedly arrived on America. Moreover, he failed to find any gold, but the Spanish kingdom wanted to expand its empire in America to spread its religion and cultures. They sent missionaries, built churches, introduced European way of farming and growing crops in their colonies, and introduce the Native Americans to Spanish culture by encouraging them to dress and behave like Spaniards. The missionaries were ordered to do religious conversion and cultural assimilation among the Native Americans.
English expansion was caused by social, political and economical factors.