Four hundred and fifty laborers, in two reliefs
On the day the great bombardment opened, Fort Sumter’s engineer reported “a working force of 450 laborers and mechanics… employed in two reliefs, day and night, upon the defenses of this post,” with a considerable sick list. Most of them were enslaved men, impressed from lowcountry plantations.
Official Records, Series I, Vol. 28, Pt. 2
