The Colonies of Tegryon
The sole intellectual property of the Republic of Triasamene gunpowder is the most closely guarded secret in the world. The economic power it brings the Republics is only matched by the ability to withold the powder from one or other side of a war. This gives the Republics a power disproportionate to their size.
There have been countless attempts at industrial espionage over the centuries but it has never been successfully extracted from gnomish fingers.