What Was Sir Frances Drake's Primary Goal?

Sir Francis Drake was an explorer best known for circumnavigating the globe. However, his primary goal was to break Spain's monopoly of the oceans.

Drake was an integral part of defeating the Spanish Armada, and he has also been referred to as a pirate because of his tendency to loot Spanish ships he defeated at sea. However, aside from his aggressive stance against Spain, he was also known to rescue wayward explorers who got lost in the Chesapeake area. When Sir Walter Raleigh took a group of settlers to Roanoke the first time, the conditions were bad, and they ran out of supplies. Drake came along and offered the extra supplies he had, but the remaining colonists decided to return to England rather than accepting the supplies.