As the kings of Erebor and Dale die, the new generation fights on ...

Sauron's forces and the dwarves of Erebor fight on.
The battle for the Lonely Mountain rages on, the city of Dale got overun by Saurons orc's and the civilians of Dale are hiding inside Erebor where the men and dwarves of Dale and Erebor hold their ground not knowing or they can hold off the legions of orcs.
In the heat of battle King Brand of the people of Dale died and while defending the body of his dead friend King Daìn Ironfoot dies in battle too.
What will happen next?
The year is 3019 of the Third Age.