Key Facts
- Date
- 300–298 BCE
- Key city contested
- Lampsacus (captured at least twice)
- Strategic achievement
- Complete blockade of the Hellespont established
- Diplomatic result
- Alliance with Seleucus I via marriage of Stratonice
- Preceding event
- Battle of Ipsus, 301 BCE (Antigonid defeat)
Strategic Narrative Overview
Demetrius contested the strategically vital city of Lampsacus with Lysimachus, capturing it at least twice without permanently occupying it. His forces won several skirmishes and succeeded in establishing a full blockade of the Hellespont, giving him a strong bargaining position. Growing dissensions among the victorious Diadochi further weakened his opponents' ability to press their advantage against him.
01 / The Origins
Following the catastrophic Antigonid defeat at the Battle of Ipsus in 301 BCE, Demetrius I Poliorcetes found himself stripped of much of his power and territory. Facing potential annihilation, he directed a series of raids into the Thracian Chersonese targeting Lysimachus, one of the victorious Diadochi, seeking resources, military revival, and leverage among the fractious successors of Alexander the Great.
03 / The Outcome
Around 299–298 BCE, Demetrius left the Thracian Chersonese for the Middle East, where he reconciled with his former enemy Seleucus I, sealing the alliance by giving his daughter Stratonice in marriage. The campaign restored Demetrius to a recognized place among the Diadochian powers, rebuilt his military forces, and recovered a measure of his political prestige.
Belligerents & Mobilization Analysis
Side A
1 belligerent
Demetrius I Poliorcetes.
Side B
1 belligerent
Lysimachus.
Kinetic Engagement Axis
Scroll horizontally to view full axis. Events plotted relatively.