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The Portuguese-born sailor, Juan Rodriguez Cabrillo, became the first European to explore California, landing at San Diego on September 28.
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The entrance to San Francisco Bay, La Boca del Puerto is discovered on November 1 by Sergeant Jose Ortega.
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On July 31, 1846, a weary company of about 220 Latter-day Saints passed through the rocky portals of the Golden Gate, anticipating the end of a difficult six-month voyage which took them around the southern tip of South America
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James Marshall discovered gold at Sutter's sawmill in Coloma in January 1848, along the south fork of the American River, thus kicking off the famous Gold Rush of 1849 from whence the term "49ers" was coined.
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California was admitted into the Union as the 31st state on September 9, 1850.
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By 1870 San Francisco had become the tenth largest city in the United States.
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in San Francisco on December 28, the steamer Arago, which arrived here from the north today had one of the roughest voyages of the season. On her last trip she encountered heavy storms and had to be thoroughly overhauled and repaired.
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On November 19 American Anti-Imperialist League founded. Created to protest the annexation of Cuba, Puerto Rico, Guam, and the Philippines after the Spanish-American War, the Anti-Imperialist League was the first national anti-imperialist organization formed in the United States.
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February 19 President Roosevelt signed Executive Order 9066, authorizing the secretary of war to define military areas "from which any or all persons may be excluded as deemed necessary or desirable.
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March 2, 1942 General DeWitt issued Public Proclamation No.1, creating military areas in Washington, Oregon, California, and parts of Arizona and declaring the right to remove German, Italian, and Japanese aliens and anyone of "Japanese Ancestry" living in Military Areas No.1 and 2 should it become necessary.