Fearing a Spanish attack on the capital of South Carolina in 1704, English and French colonists directed enslaved Africans to excavate many tons of earth to create a moat and earthen wall around Charleston. This continuous line of entrenchment, stretching nearly a mile in length, included numerous cannon placed within bastions and redans, while a single gateway with drawbridges controlled access into and out of the town. The defensive works of 1704 transformed Charleston into an “enceinte” or enclosed settlement of just sixty two acres that restricted the community’s growth for decades.