The Chronicles of Darien is both the name of the book that came with the game Total Annihilation Kingdoms, as well as the tales within that tell the history of the world of Darien.
It covers in the ancient kingdom of Kandra , what led to its fall, the birth of the one that would be known as Garacaius, his uniting of the lands, and the war that happened after he left the world in the hands of his four children.