<P> Fort Sullivan was renamed Fort Moultrie shortly after the battle to honor Colonel William Moultrie for his successful defense of the fort and the city of Charleston . Extensively modified in the years after the battle, it was supplanted by Fort Sumter as the principal defense of Charleston prior to the outbreak of the American Civil War . In 1876, to celebrate the centennial, companies from Savannah, Augusta, Macon, Columbia, New York and Boston were invited to Charleston . The site was turned over to the National Park Service in 1960, and is now part of Fort Sumter National Monument . </P> <P> A small monument to the Battle of Sullivan's Island has been placed at the northeastern tip of the island, overlooking the inlet where General Clinton's soldiers had hoped to cross . The monument includes historical markers describing the events surrounding the engagement . </P> <P> One iconic emblem of the battle was the flag designed by Colonel Moultrie . Commissioned by the colonial government, he designed a blue flag with a white crescent in the top left corner, which was flown at the fort during the battle . Despite being shot down during the siege, it was seen as a symbol of this successful defense (and famously raised during victory). It came to be known as the Moultrie flag or Liberty Flag . When Charleston (lost to the British in the 1780 siege) was reclaimed by American forces at the end of the war, the flag was returned to the city by General Nathanael Greene . </P> <P> Beginning on the first anniversary of this victory in 1777 Charlestonians and South Carolinians celebrate "Carolina Day" annually to commemorate this first major victory of American Forces over the British . Each year local events include a parade in downtown Charleston and reenactments at Fort Moultrie on Sullivan's Island . </P>

Who rescued the flag at the battle of sullivan's island