Ah yes, Canada and Denmark's epic battle for Hans Island. Hans Island is not far from Greenland's coast, and Canada and Denmark have been fighting over it for years. War ships from both sides patrol the area; when they encounter each other they...show their flags. When the soldiers leave the ships they...take the other side's flag down and raise their own. Sometimes they leave a bottle of whiskey too. Quite possibly the tamest war ever, despite America and Sweden's encouragement.