Oregon : State History Dates
May 11, 1792 - Captain Robert Gray and his crew explored the waters around the Columbia River.
October 29, 1792 - Lieutenant William Broughton names Mount Hood for Admiral Samuel Hood. Mount Hood is the tallest mountain in Oregon.
March 23, 1806 - The Lewis and Clark Expedition, having reached the Pacific Coast, left Fort Clatsop, Oregon and began their journey home.
February 22, 1819 - The Adams-Onis Treaty was signed between the U.S. and Spain, establishing the southern border of the Oregon Territory.
May 16, 1842 - The wagon train from Elm Grove, Missouri began their journey to Oregon along the Oregon Trail.
May 2, 1843 - As part of the Organic Act of 1843, a three person governing system was put in effect. The committee consisted of Alanson Beers, Joseph Gale and David Hill.
June 3, 1845 - George Abernethy was elected as the Oregon Territory’s first provisional governor.
June 15, 1846 - The Oregon Treaty was signed between Great Britain and the United States. The Treaty established boundaries at 49 degrees north.
November 29, 1847 - The Whitman Massacre occurred in the Oregon Territory and was one of the catalysts for the Cayuse War. Missionaries Marcus and Narcissa Whitman were killed in the attack.
September 27, 1850 - The Donation Land Act of 1850 encouraged settlement in the Oregon territory by giving people free land.
February 8, 1851 - Portland, Oregon was officially incorporated.
November 9, 1857 - The Oregon State Constitution was ratified.
February 14, 1859 - Oregon officially became the 33rd U.S. state.
May 3, 1880 - The construction on the Tillamook Rock Lighthouse officially began today. Construction crews had started clearing rock from the location on October 21, 1879. The lighthouse would be officially lit on January 21, 1881 and would go dark on September 1, 1957.
September 9, 1942 - The “Lookout Air Raid of 1942” occurred on this date. A Japanese submarine surfaced off the coast of Cape Blanco, Oregon. A small plane was then deployed which dropped incendiary bombs on Mount Emily, located in southwestern Oregon.
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