The Manila galleon.--In 1580 Portugal was united with Spain, and, until 1640, when Portugal regained her independence, Manila was an important center for the commerce of the combined Spanish and Portuguese colonies. A regular trade was established from Manila to Mexico and Spain, but was restricted to one or two annual galleons each way between Manila and Acapulco.
New interest in the California coast.--The development of the Philippine trade, the necessity of protecting it from other nations, continued interest in the Northern Mystery, and the opening of pearl fisheries in the Gulf of California, led to renewed exploration of the northern Pacific coasts and to renewed attempts to settle and develop California.
The regular course of the east-bound Manila galleon lay along the path marked out by Urdaneta northeastward from Manila to about latitude 42,° thence across the Pacific to the American continent off Cape Mendocino, and down the coast to Acapulco. The voyage was arduous. By the time the vessels reached the American coast half of the scurvy-afflicted crew and passengers were dead, and the vessels needed repairs. Hence a port of call was gravely needed for the Manila galleons.
The Strait of Anian.--Moreover, Spanish interests in the Pacific, were insecure. The Portuguese were no longer rivals, but French and English freebooters were active on the Atlantic and might venture upon the Pacific. Besides, there was the fear that the French, English, or Dutch, operating in the northern Atlantic, would discover the Strait of Anian and secure control of the direct route to the Spice Islands, just as Portugal had monopolized the African route.
Drake and Cavendish.--These fears were made realities in 1579 when Drake appeared on the California coast. In 1577 he had passed through the Straits of Magellan. Reaching the Pacific with only one vessel of the five with which he had started, he proceeded up the coast of South America, plundering as he went. In the harbour now known as Drake's Bay, just north of San Francisco, he refitted, claiming the country for England and calling it New Albion. Drake then sailed to the East Indies, obtained a cargo of spices, crossed the Indian Ocean, rounded the Cape of Good Hope, and reached Plymouth in November, 1580. He claimed to have discovered the Strait of Anian, and this further disturbed the minds of the Spaniards. For his daring voyage he was knighted by Queen Elizabeth.