Siege of Liège (1635)

Timeline

1. 1635Spanish Netherlands · Spanish NetherlandsIn May 1635 France formally declared war on Spain on the grounds that Spain had violated the Treaty of Burgundy. France under Richelieu then coordinated joint military action with the Republic of the United Provinces; the Franco-Dutch army pushed deep into the Spanish Netherlands, opening the fiercest campaign sequence on the western front of the Thirty Years' War.
2. 1635Prince-Bishopric of Liège · Prince-Bishopric of LiègeThough the Prince-Bishopric of Liège claimed neutrality, it could not protect itself, lying at the center of the corridor where the Franco-Dutch army and Spanish Habsburg forces fought. Armies of both sides repeatedly passed through or occupied Liège territory; the city suffered requisitions of supplies and military coercion, and its neutral status became a dead letter.
3. 1635Liège · Prince-Bishopric of LiègeOnce the siege formally began, Liège's defenses could not withstand professional siege artillery. After bombardment and economic blockade, the city was forced to compromise and accept the occupiers' terms. This event became a typical case of small ecclesiastical territories losing their autonomy amid the great-power strategic contest of the Thirty Years' War.