Playing as Norway with colonial nations from northern Canada (Vinland) to Texas (New Norway) and the Caribean, my ally GBR has dragged me into a war with Castille, Portugal and France over the Castillan St. Maarten. This is a war that can't be won, but so far it's a draw. What happens if I make a separate peace? Will my colonial nations peace out as well? I've unchecked war leader negotiation on my behalf. Does this cover my colonial nations as well?
