After the battle with Sylvanas It seems to be a defeat the throne has been shaken The reason for the war was led by the dark princess with the sole purpose of affirming and establishing a nation that had died and resurrected at the hands of Bolvar. After the defeat of Bolvar, the evil god Sargeras personally stood up with the predecessor of the throne Arthas to share a part of his soul to bring back his king and the new unknown king was born.