The Vikings are a warlike tribe, but this time they did not cause the conflict that erupted in the fields of Cows vs Vikings. You will be surprised, but the instigators are ordinary cows, although after the events that have occurred, they can not be called normal. A peaceful herd of lazy wheat-buns suddenly turned into fighting, aggressive cows. To begin with, their leader appeared in the village of the Vikings and invited them to surrender without a fight. This surprised the bearded men in horned helmets. They laughed together, but then they realized that it was a serious matter. In domestic animals, an evil force that hungers for blood. Given the size of cows and their number, such an army should be feared. Help the Vikings defend their positions with towers and other defensive structures.