section_path: History/Celts, Germanic tribes and Romans (800 BC–410 AD)
section_name: Celts, Germanic tribes and Romans (800 BC–410 AD)
paragraph_text: Celts, Germanic tribes and Romans (800 BC–410 AD)
  
  From 800 BC onwards, the Iron Age Celtic Hallstatt culture became influential, replacing the Hilversum culture. Iron ore brought a measure of prosperity and was available throughout the country. Smiths travelled from settlement to settlement with bronze and iron, fabricating tools on demand. The King's grave of Oss (700 BC) was found in a burial mound, the largest of its kind in Western Europe.
  
  The deteriorating climate in Scandinavia from 850 BC and 650 BC might have triggered the migration of Germanic tribes from the North. By the time this migration was complete, around 250 BC, a few general cultural and linguistic groups had emerged. The North Sea Germanic Ingaevones inhabited the northern part of the Low Countries. They would later develop into the Frisii and the early Saxons. The Weser–Rhine Germanic (or Istvaeones) extended along the middle Rhine and Weser and inhabited the Low Countries south of the great rivers. These tribes would eventually develop into the Salian Franks. The Celtic La Tène culture (c. 450 BC to the Roman conquest) expanded over a wide range, including the southern area of the Low Countries. Some scholars have speculated that even a third ethnic identity and language, neither Germanic nor Celtic, survived in the Netherlands until the Roman period, the Nordwestblock culture.
  
  The first author to describe the coast of Holland and Flanders was the geographer Pytheas, who noted in c. 325 BC that in these regions, "more people died in the struggle against water than in the struggle against men." During the Gallic Wars, the area south and west of the Rhine was conquered by Roman forces under Julius Caesar from 57 BC to 53 BC. Caesar describes two main Celtic tribes living in what is now the southern Netherlands: the Menapii and the Eburones. Under Augustus, the Roman Empire would conquer the entirety of the modern day Netherlands, incorporating it into the province of Germania Antiqua in 7 BC, but would be repelled back across the Rhine after the Battle of Teutoburg Forest in 9 AD, with the Rhine becoming fixed as Rome's permanent northern frontier around 12 AD. Notable towns would arise along the Limes Germanicus: Nijmegen and Voorburg. In the first part of Gallia Belgica, the area south of the Limes became part of the Roman province of Germania Inferior. The area to the north of the Rhine, inhabited by the Frisii, remained outside Roman rule, while the Germanic border tribes of the Batavi and Cananefates served in the Roman cavalry. The Batavi rose against the Romans in the Batavian rebellion of 69 AD but were eventually defeated. The Batavi later merged with other tribes into the confederation of the Salian Franks, whose identity emerged in the first half of the third century. Salian Franks appear in Roman texts as both allies and enemies. They were forced by the confederation of the Saxons from the east to move over the Rhine into Roman territory in the fourth century. From their new base in West Flanders and the Southwest Netherlands, they were raiding the English Channel. Roman forces pacified the region but did not expel the Franks, who continued to be feared at least until the time of Julian the Apostate (358) when Salian Franks were allowed to settle as foederati in Texandria.