Key Facts
- Duration
- 4 August – 2 September 1944
- Mainland surrender date
- 17 August 1944
- Island garrison surrender
- 2 September 1944 (Île de Cézembre)
- Strategic objective
- Capture port for Allied supply operations
- Port outcome
- Rendered unusable by German demolitions
Strategic Narrative Overview
Initial Allied assault attempts failed, prompting a siege. U.S. Army infantry units, supported by Free French and British forces, systematically reduced fortified German positions using artillery and air support. The last mainland German stronghold surrendered on 17 August 1944. The nearby island of Cézembre, whose garrison continued to resist, was subjected to air and naval bombardment before finally capitulating on 2 September 1944.
01 / The Origins
Saint-Malo was designated a German fortress under the Atlantic Wall program, with its coastal defenses significantly expanded before the Allied landings in Normandy in June 1944. As Allied forces planned their breakout across France, capturing Saint-Malo's port was considered essential for landing supplies. When Allied armies broke out of Normandy and entered Brittany in early August 1944, a decision was made to assault rather than merely contain the garrison.
03 / The Outcome
Allied forces secured Saint-Malo and eliminated the German garrison, but German demolitions had rendered the port infrastructure unusable, negating the primary strategic rationale for the assault. The town itself suffered severe damage during the fighting and was substantially rebuilt in the postwar years. The battle formed part of the broader Allied sweep through Brittany following the breakout from Normandy.
Belligerents & Mobilization Analysis
Side A
3 belligerents
Side B
1 belligerent
Kinetic Engagement Axis
Scroll horizontally to view full axis. Events plotted relatively.