USA HISTORY

Detailed explanation-1: -The area of California was never organized as a territory, but was administered from 1848 to statehood by a federal military authority. California was admitted to the Union on September 9, 1850, as the 31st state.

Detailed explanation-2: -In 1849, Californians sought statehood and, after heated debate in the U.S. Congress arising out of the slavery issue, California entered the Union as a free, nonslavery state by the Compromise of 1850. California became the 31st state on September 9, 1850.

Detailed explanation-3: -An Act for the Admission of the State of California into the Union was the formal title given to the Congressional legislation passed by the 31st Congress, and signed by President Millard Fillmore on September 9, 1850, which admitted California as the 31st state to the Union.

Detailed explanation-4: -Mexico had reluctantly ceded California and much of its northern territory to the United States in the 1848 Treaty of Guadalupe Hidalgo.