Dimmaland Proving Grounds

The Dimmaland Proving Grounds (Gardic: Tilraunasvæðið á Dimmalandi) is a 24,000 square kilometre training and test area located in the Dimmaland Desert and operated by the Gardic Realm Defence. Established in 1910 as an artillery firing range, it has since hosted a wide variety of military exercises, weapons tests and scientific experiments conducted by the Gardic Governments and its allies. The secretive nature of its operations as well as the tight security surrounding the area has made the site a common trope in conspiracy theories and popular fiction.

Dimmaland Disaster
1979. Castle Bravo on land. Was bad. Many thyroid cancers. No more atmospheric testing.

Conspiracy theories
THE TRUTH IS OUT THERE