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Roop County, Nevada facts for kids

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Roop County
County of Nevada Territory

1861–1864 Lassen County|
Washoe County|
 -  Established 1861
 -  Disestablished 1864
Today part of United States

Roop County, until 1862 known as Lake County, was a county of Nevada Territory in the United States from 1861 until 1864. It was created in 1861 as one of the original nine counties of Nevada. In 1864 it was succeeded by Lassen County, California and Washoe County, Nevada.


In 1862 Lake County was renamed Roop County after Isaac Roop, governor of the unofficial "Provisional Territorial Government of Nevada Territory," which had previously existed in the same area. When Roop County was created, the border between Nevada and California was poorly defined in Nevada's Organic Act, and much of Roop County, including Susanville, was claimed by California as part of Plumas County. The establishment of Lake (later, Roop) County in northwestern Nevada created a boundary dispute with California. This has been called the Roop County War, the War of Injunctions, or the Sagebrush War.

This resulted in the appointment of a joint California–Nevada boundary survey, with Surveyor-General J.F. Houghton acting for the State of California and Butler Ives, for the Territory of Nevada. The final surveyors report, accepted by California on April 4, 1864, and by Nevada on February 7, 1865, proved that the Honey Lake area was in California. The California portion of Roop County became part of the newly created Lassen County, California, in 1864. The remainder was ceded to Washoe County, Nevada.

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