They had already broken the peace treaty. They employed terrorists to threaten our area of space- the decision was made not to negotiate because they couldn't be trusted to uphold another treaty.

[He hadn't made that decision entirely by himself but he had advocated for the weapon to be used. He thought that it was the best way to end a war that could have ripped the galaxy apart again for years.

And he truly believed that now, with the Republic gone and the Resistance all but wiped out, that they could start restoring peace and stability to the galaxy. He watched Klaus, his eyes following him.]

They didn't know we had Starkiller.