Contrary to what most commonfolk believe or remember, Irin doesn't contain the entire mortal realm. In fact, a mere millenia ago there wasn't even such a thing as Irin. Every race lived their own lives in their own territories, only forging temporary alliances when needed and of course also waging the occasional war for ground, resources or honor.
That is, until something that is, or at least was, known as the Great Sundering happened upon the realm. By now only a mere whisper in the memories of the most devoted scholars, the Great Sundering drove the mortal realm to the brink of destruction. While no one truly remember what really happened, there is one thing all agree upon, that the destruction was so widespread, so unstoppable, that whatever remained of the mortal races had no choice but to gather together under a single purpose, a single banner with a single enemy; the very world they lived on. A task force consisting of every sentient race the realm had to offer and lead by the legendary human hero Aelu Dawnbreaker, set out to put an end to whatever it was that was putting the Great Sundering in motion. Many years were they gone, without a sign and without the world coming to peace. Though at long last the Sundering stopped as mysteriously as it started. While the task force was never heard of again, there was no one who dared deny that their bravery played a vital role in the halting of the end of the realm and most importantly, the survival of its inhabitans. These survivors made a joint empire, what we now know as Irin.
That is, until something that is, or at least was, known as the Great Sundering happened upon the realm. By now only a mere whisper in the memories of the most devoted scholars, the Great Sundering drove the mortal realm to the brink of destruction. While no one truly remember what really happened, there is one thing all agree upon, that the destruction was so widespread, so unstoppable, that whatever remained of the mortal races had no choice but to gather together under a single purpose, a single banner with a single enemy; the very world they lived on. A task force consisting of every sentient race the realm had to offer and lead by the legendary human hero Aelu Dawnbreaker, set out to put an end to whatever it was that was putting the Great Sundering in motion. Many years were they gone, without a sign and without the world coming to peace. Though at long last the Sundering stopped as mysteriously as it started. While the task force was never heard of again, there was no one who dared deny that their bravery played a vital role in the halting of the end of the realm and most importantly, the survival of its inhabitans. These survivors made a joint empire, what we now know as Irin.