A potential colonial power interested in Alta California was Russia, already established in the Pacific Ocean in Alaska. Their Maritime Fur Trade originally focused in Alaska started making expeditions to the California for harvesting sea otters and fur seals. These furs could be traded in China for large profits. After the conclusion of the Seven Year War between Britain and France and their allies (in U.S. called the French and Indian War) (1754–1763) France was driven out of North America, Spain, Russia and Britain were the only colonial powers left in North America.