This a Cliff note version of this event that occurred on February 15, 1863, that would result in the creation of Lassen County. In the simplest terms the conflict also known as the Boundary War was the result of John C. Fremont’s selection in 1850 of the 120th Meridian for California’s eastern boundary. The problem was no one knew where that was, and assumed it followed the crest of the Sierra Nevada Mountains. In the late 1850s, with the settlement of the Honey Lake Valley, officials of both California and Nevada saw the uncollected tax dollars waiting to be had. Tensions escalated wherein an armed conflict from the two states took place at Roop’s Fort, also known as Fort Defiance. In the end a truce was called when both sides agreed to conduct a boundary line survey to locate the 120th Meridian, in which it was determined the majority of the Honey Lake Valley was located in California.

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