phenomen a book

The year is 1463, the continent of Atlasia witnessed a great war between the alliance of the Kingdoms of Latila and the Kingdom of Vlenna against an empire by the name of Elestovakia. The war, first thought to be a hopeless resistance of the two tiny kingdoms against a mighty empire, turned out to be a war that put an end to the empire and gave birth to a new dominator formed by the victors, forever altered the history of that world. That victory, unknown to many people, largely came from the intervention of an interworld-traveler from modern Earth, who entirely upset the balance of power throughout the war. Instead, the credits were given to people who seized the opportunity the said traveller gave them to achieve the victory they needed.