As was said in the beginning, the "Heroes of Once" were a quite unusual adventuring group, which turned out to be the best thing happening for this worlds prolonged existence as we know it. The aspects of democratic governments around the globe was just implemented a short 160 years ago, and even though most realms just stayed inside their common grounds and within their borders, real communication was scarce beyond the general messenger. And since the common folk and most organizations, like mercenary groups or merchants, did not care about the races or people they belong too, the sovereigns had a difficult time adhering to new standards. So it was rare seeing one of the rulers talking to anyone else besides important messengers or other rulers. With this in mind it becomes clearer how much influence the heroes had, who not only had recurring audiences with the King of Humanity Jonathan Morley Adamus de Payne I, but even made contact with the King of Elves Khiiral Theyarus'lool Urimys, who was known for being quite reserved and not very welcoming of strangers.
So the Heroes of Once managed to gain enough influence to advise the two known reigning kings in the south-west region of Ibalania and were welcomed as their guests. The now known kingdom of the Dwarves, Kheg Khuldor, was later founded by one of the members of that group, as the first surface dwelling dwarves on this continent, instead of this race living underground, in a place called Nekk Khuldor, far away from anything that happened above. The dwarves were not involved in the fight against the demonic dragon Zeoldoras.
As the dangers were approaching and the deeds of this vile creature were more and more crucial, the heroes needed assistance from their allies, from friends they made on their journeys and from the kingdoms they won over. After they found the lair of the dragon and gained the knowledge how to defeat it and seal the portals to the Shadowfell, from which the demons and devils entered this world, they came up with their plan. They had the solution to saving this world from annihilation by the evil forces, they only needed some manpower.
So by gaining the trust of two of the most powerful men in this continent, they managed to get them to work together, with all the other races, to make a joined military group, dedicated to defeating the evil henchmen. A first alliance, that was strong enough to survive until now, that was born from need but stayed through friendship and camaraderie. The two kingdoms, that existed peacefully side by side but ignored each other now joined forces to defeat one common enemy.
And with an army at their back and the safety of the people in trustworthy hands, the Heroes of Once made way to the dragons lair, ready for their last battle and with hope in their hearts to see the next dawn again.