Cataclysm

''Hundreds of years ago, advanced cultures thrived on Novia. But then the moons were shattered, which started a large celestial event that caused a global apocalypse. Civilization was destroyed, but not everyone was killed. Thanks to foresight, hardiness, or luck, a few people were able to ride out the catastrophe and rebuild in the chaos that followed.'' - Thibodeaux

The Cataclysm, also called "the Fall", occurred nearly 400 years ago. While the actual events are shrouded in mystery, it is known that the Moons collided, shattering the larger to form Daedalus. Shards of the smaller fell, devastating the land and its people. Notions of magic and science were tilted on their heads. The Shard Falls appeared, as did new magicks and strange new creatures.

Trivia
Old Britannia had two moons: Trammel and Felucca.