Eberron: Scales of War
The Last War was a conflict raging between Aundair, Breland, Cyre, Thrane, and Karrnath, along with all of their satellite nations. Its purpose was to reunite the kingdoms of Galifar after they were divided with the death of Emperor Jarot. The conflict lasted over a century and ended inconclusively after the destruction of Cyre in the Day of Mourning. This lead to the Treaty of Thronehold that temporarily suspended the conflict until the cause was discovered.
As king Jarot of Galifar approached old age, questions about the succession of his throne ran rampant. Although by tradition, his eldest scion, Princess Mishann of Cyre was to claim the throne, others doubted her ability to rule. It was widely considered that the second oldest, prince Thalin of Thrane, would rule as regent in her stead. However, on the king’s deathbed in 894, he only gave Mishann his own blessings, excluding Thalin, and bade Prince Wrogar of Aundair to honor his decision.
At the funeral shortly thereafter, Mishann discussed the details of her coronation with her siblings, but they held a deaf ear to her words. Indeed, they personally threatened to send their soldiers to Thronehold to prevent any such action. Only her brother Wrogar remained allied to Cyre, since he was bound by honor. In the year 894 YK hostilities commenced. Alliances were formed, shifted, and were broken over course of the war. Virtually no part of the continent was unaffected.
The Treaty of Thronehold was signed in 996, 2 years after the Day of Mourning destroyed Cyre and effectively put an end to the conflict while at the same time creating and recognizing the many new nations and territories that came into existence during the Last War or at the conclusion of it. Although the five principal nations (Aundair, Breland, the survivors of Cyre, Thrane, and Karrnath) abide by the Treaty, many feel that the current peace will only give way to more warfare. Until one nation defeats the others and claims the throne of ancient Kingdom of Galifar, many believe there will never be a true and lasting peace.
Behind the Scenes
The Last War seems to be partially based on the Hundred Years’ War, including in its origin as a war of succession denying a female heir, introduction of new military technology, and duration of around a hundred years; and the First World War in its new technology and inconclusive outcome.