The Bonnie Blue flag was the official flag of the Republic of West Florida.  It was adopted by Florida shortly after their revolt and separation from Spain, and flown until its annexation by the United States 74 days later.  It went on to inspire many other famous flags, including the famous Lone Star Flag of Texas and the California State Flag.  It was flown by the Confederacy during the civil war is used to represent the values of Federalism, usually with an emphasis on State over Federal government.