So basically sabotage their wartime logistics?If we want to sabotage, why don't we attack their food supply? No army can go with empty stomach and will cause people to riot.
I think the idea was that the supply lines are sabotaged so they will have problems supplying an offensive war. They are going to pillage parts of Wingbardy anyway at that point.might encourage them to invade Wingbardy if they start running low on food since Wingbardy has a lot of food and not a lot of solders.