1842, the U.S. Army soldiers who perished in the 1835 Dade Massacre in present day Sumter County, Florida, were re-interred here under 3 coquina pyramid shaped monuments. Over 1,300 other U.S. casualties of the Second Seminole War would later be buried here. This cemetery would later be redesignated the St. Augustine National Cemetery and would contain U.S. military personnel from the American Civil War, the Spanish–American War, World War I and World War II, as well as ten British and British Commonwealth military personnel from World War II before it was closed to further interments. At the start of the Civil War, there was only one U.S. Army ordnance sergeant on duty at St. Francis Barracks, Sergeant Henry Douglas, who was responsible not only for the Barracks but also for nearby Fort Marion (the American name for Castillo de San Marcos). On January 7, 1861, before Florida's formal secession from the Union, members of a newly formed local militia unit named the St. Augustine Blues went to the St. Francis Barracks to demand the keys to the fort. The U.S. Army sergeant complied with the stipulation that he receive a receipt for the fort, which he was given. SGT Douglas would later report that, "All military stores at this place were seized this morning by order of the Governor of the State of Florida. A company of volunteer soldiers marched to the barracks and took possession of me, and demanded peaceable possession of the keys of the fort and magazine." The U.S. Army deactivated Fort Marion and St. Francis Barracks in 1900 and leased the Barracks to the Florida State Troops, the forerunner of the present day Florida National Guard, in 1907. St. Francis Barracks was formally given to the State of Florida for use as the State Arsenal in 1921 by an act of Congress. After receiving use of the Barracks via lease in 1907, the buildings were not immediately occupied. In 1915, St. Francis Barracks was gutted in a fire, however, the original coquina stone walls remained standing. The building was rebuilt in 1922 using the original walls. Today, St. Francis Barracks, also known as the State Arsenal, is home to the Headquarters, Florida National Guard, headed by the Army or Air Force officer serving as The Adjutant General (TAG) of Florida, and the TAG's associated staff. It is also serves as the organizational headquarters for the Florida