Between 1840 and 1950, more than fifty-three thousand people hiked the Oregon Trail. Exposure of Native Americans to diseases such as smallpox and diphtheria decimated the tribes, which, coupled with settlers' encroachment on tribal lands, was the cause of many conflicts between Native Americans and new Europeans. The Land Donation Act, a government land grant granting three hundred and twenty acres to white men and six hundred and forty to married white couples, provided impetus for westward expansion and the American idea of “manifest destiny”. This promotion of migration and families also allowed America to strengthen its hold on Oregon, with the aim of displacing British claims. Following exploration by the Spanish and French in the 17th and 18th centuries, Oregon was charted by the Lewis and Clark Expedition in their search for the Northwest Passage. Beginning in the 1830s, many groups of pioneers traveled to the state via the famous Oregon Trail, and the United States began to jointly settle the area with the United Kingdom. In 1846, the border between the United States and British territory, officially established at the forty-ninth parallel, the part of the territory given to Great Britain, eventually became part of Canada. Oregon was officially admitted to the Union as a state on February 14, 1859. The mountain was named in 1792 by British Lieutenant William Broughto after a famous naval officer, Alexander Arthur Hood. Lewis and Clark were the first Americans to document their view of Mount Hood while traveling through Oregon. Mount Hood National Forest lands were first officially designated in 1892 as the Bull Run Timberland Reservation, founded by former President Benj...... middle of paper ...... on the Hanford Nuclear Reservation. The waste was found in a new location between the walls of the AY-102 tank. This is dry waste covering an area of ​​7 feet by 21 inches. The Tri-City Herald reported Thursday that no waste appears to have escaped into the ground beneath the reservoir. Hanford officials knew the tank was leaking for about a year. State officials urged the U.S. Department of Energy to empty the reservoir and criticized federal officials for failing to take action. Oregon's pioneering spirit has continued through the years in many ways. influenced the rest of the country. Citizens support the environment, cultural affairs and a lifestyle that combines urban amenities with the wonders of our wilderness. Oregon is an important part of its residents' lives, and they love sharing their history, products, and beauty with others..