Unsuccessful siege (1628) on Stralsund by Albrecht von Wallenstein's Imperial Army during the Thirty Years' War
The failed siege halted Wallenstein's Baltic campaign and gave Sweden a foothold in the Holy Roman Empire, enabling full Swedish intervention in 1630.
Key Facts
- Siege start date
- 13 May 1628
- Siege end date
- 4 August 1628
- Duration
- Approximately 83 days days
- Imperial commander
- Albrecht von Wallenstein
- Defender reinforcement commander
- Alexander Leslie (Swedish force)
- Strategic outcome
- Swedish bridgehead secured in Holy Roman Empire
By the Numbers
Location
Cause → Event → Consequence
During the Thirty Years' War, Albrecht von Wallenstein led an Imperial Army on a campaign to dominate the Baltic coast. Stralsund, an independent Hanseatic city and key Baltic Sea port, stood as a strategic obstacle to Imperial control of northern trade routes and maritime power.
From 13 May to 4 August 1628, Imperial forces under Wallenstein besieged Stralsund. The city was initially reinforced by Scots mercenaries in Danish service, then by a larger Swedish force dispatched by Gustavus Adolphus and commanded by Alexander Leslie. The garrison successfully repelled the Imperial assault, forcing Wallenstein to abandon the siege.
The failure halted Wallenstein's string of victories and ended Imperial ambitions to control the Baltic. Stralsund passed largely under Swedish control for much of the next two centuries, and the secured position provided Gustavus Adolphus a bridgehead within the Holy Roman Empire that directly facilitated Sweden's formal entry into the Thirty Years' War in 1630.
Belligerents & Mobilization Analysis
Side A
1 belligerent
Albrecht von Wallenstein.
Side B
1 belligerent
Alexander Leslie.