During the night of September 6–7, Confederate forces evacuated Fort Wagner and Battery Gregg pressured by advancing Federal siegeworks. Federal troops then occupied all of Morris Island. On September 8, a storming party of about 400 marines and sailors attempted to surprise Fort Sumter. The attack was repulsed. (''NPS summary'')
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During the night of September 6–7, Confederate forces evacuated Fort Wagner and Battery Gregg, pressured by advancing federal siegeworks. Union troops then occupied all of Morris Island. On September 8, a storming party of about 400 marines and sailors attempted to surprise Fort Sumter. The attack was repulsed. (''NPS summary'')