Cannon were first mounted on Brimstone Hill in 1689 during the Nine Years' War, by Jean-Baptiste du Casse, when the French used them to capture the English Fort Charles.

However, a year later, the Treaty of Paris (1783) restored St. Kitts and Brimstone Hill to British rule, along with the adjacent island of Nevis.

Following these events, the British carried out a program to augment and strengthen the fortifications, and Brimstone Hill never again fell to an enemy force.

[2] French Admiral Édouard Thomas Burgues de Missiessy raided the island and succeeded in blowing up the powder magazine in 1805.

Areas that can be toured on Brimstone Hill include the Fort George Citadel (which includes the Fort George Museum), the Western Place of Arms and the Eastern Place of Arms, all accessed via a steep walk up from the main parking area via a set of ramps and steps.