Zanzibari Cannon

The Anglo-Zanzibar War was fought between the United Kingdom and the Zanzibar Sultanate. The British won in 38 minutes, making it the shortest war fought in history. The cannon, when fired, is able to speed up the flow of events by squeezing long amounts of time into a short period. The effect is caused by firing the cannon, time will speed up faster if fired again. The artifact is naturally deactivated when the thirty-eight minutes have passed.