| Late Bronze Age | |
| About -1300 | Closure of Hallstatt salt mines. Cremation becomes the main funerary rite (fields of urns) |
| -1200 | La Croizette and Le Terrage cemeteries at Acy-Romance |
| First Iron Age or Hallstatt period | |
| -800 | A few cremation tombs at Le Terrage near Acy-Romance |
| -900/-800 | Rapid increase in the number of fortifications in mainland Europe |
| Vers -600 | Central Mediterranean towns adopt a quasi state structure: the Etruscan confederation, the Gallic peoples of southern France |
| -600/-500 | Ten princely residences become important financial and political centres or principalities, from Burgundy to Wurttemberg |
| Second Iron Age: 450– 260 Early La Tène culture | |
| -450/-400 | Burial ground at Le Terrage at Acy-Romance, La Noue de Barue settlement |
| Vers -600 | Marseille (Massalia) founded by Greeks from Phocaea |
| -600/-550 | First inscriptions in the Celtic language at Sesto Calende (Northern Italy) |
| Vers -500 | Burial of the Vix princess (Côte-d’Or) |
| -400 | The Gauls invade northern Italy |
| -396 | The Gauls cross the Alps, commanded by Ambigat, king of the Bituriges (Sénons, Andes, Insubres and Boii) |
| -390 | Rome captured by the Gauls |
| -386 | Defeat of the Romans by the Sénon on the Allia. 30,000 Celts led by Brennos occupy Rome |
| -310 | A Gallic army invades Thrace |
| -278 | The Gallic army commanded by Brennos sacks Delphi |
| -280 | Celtic expedition to Macedonia and Greece |
| Second Iron Age: 260-150 BC middle La Tène | |
| Vers -180 | The village of Acy-Romance established at La Warde / Les Carrières |
| -225/-222 | Roman conquest of Cisalpine Gaul (Northern Italy) |
| -217 | Hannibal defeats the Romans at Lake Trasimeno thanks to his Gallic allies |
| About -150 | Constitution of an Arvern empire in central Gaul. |
| Second Iron Age: 150-30 late La Tène | |
| About -200 | Cremation cemeteries at La Noue Mauroy, La Noue de Barue, La Croizette and La Noue Baudoin |
| -180/-30 | The Gallic village at Acy-Romance and the sacred site at Nanteuil-sur-Aisne, Le Népellier » |
| -125/-121 | Roman conquest of southern Gaul |
| -113 | Start of the invasion of western Europe by the Cimbri and Teutones |
| About -120 | Creation of the Nandin oppidum at Château-Porcien |
| About -80 | The village at Acy-Romance begins to decline. Development of the oppidum at Château-Porcien and the sacred site at Nanteuil-sur-Aisne. |
| -58 | Start of the Gallic Wars – The Remi swear an oath of allegiance to Caesar |
| -57 | Battle of the Aisne. Caesar crushes the Belgic alliance at Berry-au-Bac. |
| -52 | Defeat of the Gallic army led by Vercingétorix at Alésia. The Gauls' chieftain is captured by Julius Caesar |
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