 The garrison was housed in Fort San Carlos de Austria, a wooden stockade fort built in 1698.Extant records do not describe the composition of the forces that attacked Pensacola in August 1707 beyond "several hundred Tallapoosas and a few South Carolina traders".The siege began on 12 August with the arrival of a band of 20 to 30 Indians, who began terrorizing the Indians living in the town outside the fort.