The Netherlands, as a nation-state, dates to 1568, when the Dutch Revolt created the Dutch Empire. Previously, the Germanic tribes had no written language during the ancient and early medieval periods, so what we know about their early military history comes from accounts written in Latin and from archaeology. This causes significant gaps in the historic timeline. Germanic wars against the Romans are fairly well documented from the Roman perspective; however, Germanic wars against the early Celts remain mysterious because neither side recorded the events. Wars between the Germanic tribes in Northern Belgium and the present day Netherlands, and various Celtic tribes that bordered their lands, are likely due to their geographical proximity.