Jedediah Smith’s expedition reaches San Diego, becoming the first Americans to cross the southwestern part of the continent. [Source: HistoryNet.com.]
Beginning of the Modoc War in Northern California. Modoc Chief Captain Jack engages with Captain James Jackson’s cavalry.
San Francisco Mayor George Moscone and Supervisor Harvey Milk are assassinated by Dan White, a former city supervisor. White served five years in prison after being convicted of manslaughter. He committed suicide in 1985. [Sources: California: A History by Kevin Starr, and Wikipedia.]