The flag of South Carolina is believed to have been originally designed in 1775 for use by South Carolinian troops during the American Revolutionary War. The current version was adopted on 28 January 1861 as the "national" flag of the newly seceded state. The only change was the addition of the palmetto tree, which represents the defense of Fort Moultrie (constructed of palmetto logs) on Sullivan's Island from British attack in June 28, 1776. The flag remained the official state flag after the end of the American Civil War.