our citizens and the friendly Indians inhabiting our Territory those Negroes now in the said fort and which have been stolen and enticed from them." This conduct "will not be tolerated by our government and if not put down by the Spanish Authority will compel us in self Defence to destroy them." After Zúñiga's reply of May 26, 1816, informing Jackson that he could not act "unless I receive the Orders of my Captain General [in Cuba] and the necessary Supplies", Jackson proceeded with his plans to destroy the Fort. The first step was the construction of Fort Scott, located at a key military point upriver, the west bank of the Flint River where it empties into the Apalachicola, in the southwestern corner of Georgia. Boats supplying Fort Scott had to go up the Apalachicola River and past the Negro Fort. The supply boats were escorted by two gunboats. "Gaines obviously wanted to provoke an attack to justify the stronghold's destruction." When shots were fired from the Fort at passing boats, this was all the excuse for action Gaines needed. On July 27, 1816, a "hot shot" (a cannonball heated to a red glow in the gunboat's galley) from the American forces entered the opening to the fort's powder magazine, igniting an explosion that was heard more than 100 miles (160 km) away in Pensacola, and destroyed the fort, killing all but 30 of 300 occupants. It has been called "the single deadliest cannon shot in American history." It was also "the largest battle in history between fugitive slaves and U.S. forces seeking to reenslave them." Spain protested the violation of its soil, but according to historian John K. Mahon, it "lacked the power to do more." A former commemorative plaque at the scene reads as follows:It is hard to imagine the horrible scene that greeted the first Americans to stand here on the morning of July 27, 1816. The remains of 230 persons killed in the magazine explosion lay scattered about. They also found an arsenal of ten cannons, 2,500 muskets and over 150 barrels of black powder. Some original timbers from the octagonal magazine were uncovered here by excavations. The trading post of John Forbes and Company, storekeeper Edward Doyle, was reestablished following the destruction of the fort. Fort Gadsden (1818–21) To secure the militarily significant Prospect Bluff, protect commerce on the river, prevent the recreation of a