The Siege of Brest (1342): A Historical Overview

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8/19/2026 · 👁 0 · siege-of-brestbrest-1342history-of-brestmedieval-siegemilitary-history14th-century-conflict
Question
What was the Siege of Brest in 1342?
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The Siege of Brest in 1342 was a significant event during the Breton Civil War, a conflict that arose from a succession dispute following the death of John III, Duke of Brittany, in 1341 1. The primary contenders for the ducal title were Charles of Blois, nephew of the French King Philip VI, and John of Montfort 1.

Charles of Blois, supported by a substantial French army, aimed to secure control of Brittany. By August 1342, Charles had captured John of Montfort and had significantly reduced his partisans' hold to a single fortification: Brest in western Brittany 4.

The siege itself was part of a broader campaign by Charles of Blois to assert his claim. While Charles led an army against Hennebont in late May 1342, where Joanna of Montfort was based, repeated assaults were repulsed 5. However, delays in the arrival of English reinforcements, attributed to a lack of shipping and adverse weather, forced the Montfortists to retreat westward 5.

In this context, a small English force of 234 men under Sir Walter Mauny arrived at Brest 2. Despite this, the city of Brest was under siege by Charles of Blois's forces 14. The siege was eventually broken by the arrival of an English army led by the Earl of Northampton, who engaged in a naval battle off Brest on August 18, 1342 7. This engagement was part of the wider War of the Breton Succession, which lasted from 1341 to 1343 57.

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