The period is the 1840s and California is part of Mexico. Many of the citizens wish to become part of the United States. Other countries are also interested and the Russians have established bases in the northern part of the state. To further their hold they have stolen guns and Don Arturo Bordega, a leader of those wanting statehood, is out to recover them.
California Conquest is a 1952 American Western film directed by Lew Landers and starring Cornel Wilde and Teresa Wright. The film is set in the early 1840s, and deals with a conspiracy by native Hidalgo Californios to deliver the then-Mexican territory of California to the Russian Empire.