From around 2,800 BC, the Pitted Ware culture co-existed for some time with the Battle Axe culture and the Single Grave culture, which succeeded the Funnelbeaker culture in southern Scandinvia. Both were variants of the Corded Ware culture. Like the Funnelbeakers, the Corded Ware constructed a series of defensive palisades during this period, which may be a sign of violent conflict between them and the Pitted Ware. Though cultural influences of the Battle Axe culture are detectable in Pitted Ware burials, its peoples do not appear to have mixed with each other. By ca. 2,300 BC, the Pitted Ware culture had merged with the Battle Axe culture. The subsequent Nordic Bronze Age represents a fusion of elements from the Pitted Ware culture and the Battle Axe culture.