That is your excuse for betraying and attacking an ally? What a pathetic man you are, seeking to take advantage of Scotland's failing to realize a decades long ally would attack them out of the blue.

The only consolation for this even is that your fellow coalition members have seen through your petty betrayal and will not aid you. Feel free to keep up this war against one you signed a treaty of alliance with, who had never done you any harm. I suspect that lacking surprise, you will be incapable of advancing much further.