Key Facts
- Duration
- Approximately two weeks, August 1745
- French force size
- 30,000 troops
- Garrison size
- 3,600 soldiers
- French commander
- Count of Löwendal under Marshal Saxe
- Garrison commander
- Lt-Gen Karl Urban, Count of Chanclos
Strategic Narrative Overview
The French army of 30,000 under the Count of Löwendal arrived outside Ostend in August 1745. Initial engagements in the open field were followed by a sustained artillery bombardment of the town. The defending garrison of roughly 3,600 troops, primarily British under Austrian Governor Karl Urban, held out for only about a week under the bombardment before the weight of French firepower and numbers made further resistance untenable.
01 / The Origins
The siege occurred within the broader War of Austrian Succession, a conflict over the legitimacy of Maria Theresa's inheritance of Habsburg lands. France sought to exploit its decisive victory at Fontenoy in May 1745, pushing deep into the Austrian Netherlands. Britain, a key defender of the region, was simultaneously distracted by the Jacobite uprising at home, leaving its garrison forces in the Low Countries significantly weakened and vulnerable.
03 / The Outcome
The garrison surrendered and was granted honourable terms, marching out with their arms and being escorted to Mons. King Louis XV of France personally entered Ostend on 3 September 1745, underlining the political significance of the capture. The fall of Ostend further consolidated French dominance in the Austrian Netherlands and demonstrated the strategic consequences of Britain diverting troops to counter the Jacobite rebellion.
Belligerents & Mobilization Analysis
Side A
1 belligerent
Count of Löwendal, Marshal Saxe.
Side B
1 belligerent
Karl Urban, Count of Chanclos.
Kinetic Engagement Axis
Scroll horizontally to view full axis. Events plotted relatively.