In 926 , Balhae came to an end , while many of its populace including the majority of the nobility fled to Goryeo .
Eventually , they invaded Balhae in 925 and the capital Sanggyeong ( also known as Holhan fortress ) fell after ten days .
In 926 , Balhae came to an end , while many of Balhae 's populace including the majority of the nobility fled to Goryeo .
Eventually , they invaded Balhae in 925 and the capital Sanggyeong ( also known as Holhan fortress ) fell after ten days .