Rome Goes to War in Gaul | Siege of Massilia | Imperator Rome Invictus #5

ROME IS EXPANDING — BUT NOT WHERE WE EXPECTED. In Episode 5 of Imperium Aeternum, our Roman Republic has finally secured Etruria, ending the Etruscan threat in northern Italy. With Sabinia, Picentia, and Umbria already under Roman control, Rome is stronger than ever — but new dangers are rising across the peninsula. The strategic goal is clear: secure southern Italy and prepare for the inevitable conflict with Samnium and Lucania. However, politics and alliances pull Rome into an unexpected direction… A Call to Arms from Genua drags the Republic into a war against Massilia, forcing Rome to intervene beyond the Italian peninsula. What begins as a diplomatic obligation quickly becomes a full military campaign as Roman legions march north and lay siege to one of the most important Greek colonies in Gaul. Meanwhile, the Mediterranean balance of power continues to shift: • Carthage maintains a dangerous presence near Italy • Epirus begins expanding in southern Italy • Northern alliances reshape the geopolitical map • Rome strengthens its economy through exports and trade As the Siege of Massilia unfolds, the Republic must balance military expansion, economic development, and internal politics — all while preparing for the next great war that will decide control of the Italian peninsula. The question is no longer if Rome will fight the Samnites and Lucanians. The question is when. And the Republic is preparing. About the Series Imperium Aeternum is a narrative grand strategy campaign playing as Rome in Imperator: Rome with the Imperator Invictus overhaul mod. The goal of the series is to recreate a historically grounded but player-driven rise of the Roman Republic, exploring strategy, politics, warfare, and diplomacy as Rome expands across the ancient world. Game & Mods Used Game: Imperator: Rome Major Overhaul: Imperator: Invictus Mods in this campaign: 2.0 Better UI Simple Notifications Trait Categories Always Show Christian / Gregorian Date Imperator: Invictus Imperator Invictus + Performance Compatch Historical Imperator Pack – Invictus Imperator: Invictus – More Cultural Names Micro QoL Changes Culture Conflation (for Invictus) Virtual Limes (Invictus) Units Expanded (Invictus) INR – Invictus Timeline Extension for INR – Invictus Dynastic Country Names AI Royal Marriages Campaign Timeline Rome in 298 BCE stands at a crossroads. Northern Italy is secure — but the next great challenge is approaching: ⚔ The Samnites ⚔ The Lucanians ⚔ The growing influence of Epirus ⚔ And the ever-watchful power of Carthage The struggle for control of Italy has only just begun. 👍 If you enjoy grand strategy, Roman history, and narrative campaigns, consider subscribing to follow the rise of the Roman Republic. Timestamps 00:00 Introduction – Rome in 298 BCE 01:20 Recap: Conquest of Etruria, Sabinia & Umbria 02:10 The Next Target: Samnium & Lucania 03:30 Strategic Situation in Italy 05:00 Internal Development of the Republic 09:30 Food Supply & Provincial Management 13:00 Trade, Resources & Roman Economy 21:40 Stability and Political Decisions 23:10 Northern Diplomacy & Alliances 27:15 Call to Arms – War Against Massilia 29:00 Lucania Annexes Elea 30:40 Economic Growth & Roman Exports 34:40 Roman Legions Arrive in Gaul 35:15 Epirus Expands in Southern Italy 36:20 Campaign Against Massilia 37:30 Battle of Massilia 38:50 Siege of Massilia Begins 41:40 The Siege Continues 43:20 Massilia Falls 45:20 War Score & Negotiations 47:15 Fleet Operations 51:00 Diplomacy & Gifts 52:10 Roman Legions Return Home 53:50 Preparing for the Samnite War 55:20 Final Strategic Outlook