 This land was not split off from the new Arizona Territory until 1871, when it was given to Nevada by the Federal government.The Compromise of 1850 made no attempt to divide California along the line of 36°30′, or to allow slavery south of it; the social and political conditions created by the California Gold Rush ruled out any such idea.In fact, California was immediately admitted to the union as a free state

During the American Civil War (1861–65), all of the states located wholly south of 36°30′ north joined the Confederate States of America.