Short answers, pulled from the story.
The name California most likely derives from Queen Calafia, a fictional ruler whose mythical gold-rich island appeared in the 1510 novel The Adventures of Esplandian by Garci Rodriguez de Montalvo. A 2017 California state legislative document confirmed the name was on a map by 1541, placed there presumably by a Spanish navigator.
California became the 31st state on the 9th of September 1850, entering the Union as a free state under the Compromise of 1850. The United States had formally acquired the territory through the Treaty of Guadalupe Hidalgo on the 2nd of February 1848, which ended the Mexican-American War.
The California genocide refers to the state-sanctioned killing and dispossession of indigenous Californians following U.S. annexation. Between 1850 and 1860, the California state government paid around 1.5 million dollars to hire militias that perpetrated massacres of indigenous people. Historian Benjamin Madley estimates between 9,492 and 16,092 indigenous people were killed from 1846 to 1873, including between 1,680 and 3,741 killed by the U.S. Army.
California's estimated gross state product as of Q3 2025 was $4.296 trillion, making it the fourth-largest economy in the world by nominal GDP if it were an independent country, behind Germany and ahead of Japan. It is both the largest economy of any U.S. state and the world's largest sub-national economy.
The first Europeans to explore the California coast were members of a Spanish maritime expedition led by the Portuguese captain Juan Rodriguez Cabrillo in 1542. Cabrillo entered San Diego Bay on the 28th of September 1542 and reached at least as far north as San Miguel Island. The expedition was commissioned by Antonio de Mendoza, the Viceroy of New Spain.
California formally recognized the benefits of controlled burning practiced by indigenous peoples in 2022, and a new state program was created in collaboration with indigenous communities to revive the technique. The practice of using fire for ecosystem management had been outlawed in 1911, and its revival is now seen as a way to reduce dangerous forest debris and build landscape resilience against wildfires.