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:''Not to be confused with the ''Treaty with the Umpqua and Kalapuya'' of 1854, also known as the ''Treaty of Calapooia Creek'' The Treaty with the Kalapuya, etc., also known as the Kalapuya Treaty or the Treaty of Dayton, was an 1855 treaty between the United States and the bands of the Kalapuya tribe, the Molala tribe, the Clackamas, and several others in the Oregon Territory. In it the tribes agreed to cede land in exchange for money. The treaty effectively gave over the entirety of the Willamette Valley to the United States and removed Native Americans in the area. The treaty was signed on January 22, 1855, in Dayton, Oregon, ratified on March 3, 1855, and proclaimed on April 10, 1855. ==Background== In the mid-1830s, partially driven by public interest in the idea of manifest destiny, the idea that the United States should spread across North America, writers began exhorting Congress to occupy the Oregon Territory. This drove some of the first American settlers to the region, and the development of the Oregon Trail began to bring larger numbers to the area by the early 1840s. Unlike California, which was at the time still controlled by Mexico, the Oregon Territory was largely unsettled and tentatively claimed. This made it a tempting goal for those who believed that the United States should reach to the Pacific Ocean. Many of these early settlers moved to the Willamette Valley, a fertile region drained by the Willamette River. They were not the first white settlers there; a group of French Canadians, former employees of the Hudson's Bay Company, had made their homes in the French Prairie area of the valley. The Americans who arrived almost immediately began sending petitions and letters back east asking the United States government to formally claim the area and protect them from real or perceived threats, both from Native Americans and from the British. These settlers were part of a geopolitical rivalry between the United States and Great Britain over who would control the Oregon Territory, which comprised the modern states of Oregon, Washington, Idaho, a portion of Montana, and the province of British Columbia. In 1846, the two powers concluded the Oregon Treaty, dividing the territory in half. The lands of the Willamette Valley were thereafter part of the Oregon Territory of the United States, although many native groups still lived in the region and did not yet recognize American control. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Treaty with the Kalapuya, etc.」の詳細全文を読む スポンサード リンク
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