The State Flag of Sonora has a white background with the state arm of coat.
History
William Walker proclaimed himself president of the Republic of Sonora on January 18, 1854, and the new republic was divided into two states, Baja California and Sonora, the latter governed by the Civil Code in force in Louisiana. The second flag consists of 3 horizontal stripes, red, white and red respectively, in the central part of the white stripe is two stars represented by Baja California and Sonora states.
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