John IV’s Return to Brittany and the…

John IV’s Return to Brittany and the English Intervention (1373–1377)

Between 1373 and 1377, Duke John IV of Brittany, still aligned with England, sought to regain control over his duchy after being exiled in 1373 due to the French occupation led by Bertrand du Guesclin and Olivier de Clisson. To achieve this, he secured military aid from John of Gaunt, Duke of Lancaster, who landed in Brittany with approximately 10,000 troops.