Artwork of the War of the Green Flame
The War of the Green Flame was an event that happened long before the events of Ghost of a Tale. A mysterious necromantic force known as the Green Flame appeared, decimating every animal kingdom it came upon. The Mice sent an emissary to try and spare their kingdom by revealing the weaknesses of other kingdoms' fortresses; regardless, the Green Flame swept through their lands, and the Mice were labelled as traitors by the rest of the animals. The Rats eventually ended the war by defeating the Green Flame and its undead army at the island of Periclave.