Keikokumars

Arial is a soldier in the Human resistance against the Demonkind. 

After the destruction of the resistance he was given a chance to undo the past mistake.

Join as Arial went back in time and prepare to save his family and the world of humans against the Demons.
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Other synopsis

Tales of great heroes that fight dragons and demons, stories of evil monster and cruel men and cunning woman, of great heroes fighting great wars, the stories of their noble life and tragic death stretched across the stars, a thousand, and a thousand more, and a thousand more, glimmers of their battles, of hope and love and their struggles
How much stories, how many battles were fought, won or lost ?
They call it the Age of Heroes

Age of Heroes ( Age of Heroes Chronicles)

On the border between Maroth and Varnikar, a blue pigeon landed on one of the towers that overlook the state of Balhae.

The Lord Commander of the Fortress was quickly informed of that matter. A letter was attached to it. The Lord Commander of the Fortress was an old man.

But as most of the people of the Three kingdoms, he is still sturdy and his back is straight, and possessing an imposing aura even when he is walking

He was overseeing the new recruit training when someone from the Tower of Letter informed him that a letter with the seal of the lords of Maroth had arrived.

'More problems' he sighed as he thought about all the disturbing news he had heard since a fortnight ago

The Fortress that they are in is close to the fortress near the border between Balhae and Maroth.

The Affairs of the Three Kingdoms