Siege of Oldenzaal (1626)
Part of theEighty Years' War and theAnglo–Spanish War
Capture of Oldenzaal 1626
Date July 25 to August 1, 1626 Location Oldenzaal,Overijssel (present-day theNetherlands) 52°18′45.00″N6°55′45.01″E / 52.3125000°N 6.9291694°E /52.3125000; 6.9291694 Result Dutch and English victory[1]
Belligerents
Dutch Republic England	Spain
Commanders and leaders
Ernest Casimir Frederick Henry	Guillermo Verdugo
Strength
7,000 infantry and cavalry[2]	800
Casualties and losses
Unknown	All captured
class=notpageimage| Location within Netherlands Show map of Netherlands Siege of Oldenzaal (1626) (North Sea) Show map of North Sea

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Thesiege of Oldenzaal took place in the Spanish held town ofOldenzaal in theTwente region from July 23 to August 1, 1626, during theEighty Years' War and theAnglo–Spanish War. After an eight-day siege led byErnest Casimir the city surrendered.^[3][4]

Ambrogio Spinola had captured Oldenzaal in 1605 andGroenlo a year later – with this the region was under Spanish occupation and they undertook raids. In May 1626, the Dutch decided to eliminate the Spanish from the area once and for all. They brought two armies under the command ofFrederick Henry, Prince of Orange and with them a detachment of the English army which had been raised as result of their war with Spain.^[1] Oldenzaal's garrison which had been continuously strengthened since it capture and twenty years later the city had around 800 troops along with cannon under the command of Spanish Governor Guillermo Verdugo.^[5]

On July 23 the Dutch and English besieged the town and had a good view of the surrounding environment; as a result, Casimir did not find it necessary to construct acircumvallation line against a possible Spanish relief attempt. Casimir with skilled pioneers dug siege lines with trenches, and batteries were put into position. A few companies of English were detached against Broeckhuise castle on the outskirts which posed a threat but it was captured within two days.^[1] It was subsequently plundered and burnt by Dutch troops.^[6]

The canals of Oldenzaal were controlled by twosluice gates. Casimir ordered his batteries to fire on the gates which eventually collapsed and the water from the canals was drained. The besieged were now cut off and having realized there was no hope of a relief, Verdugo asked the Anglo-Dutch for terms.^[7] After a mere ten day bombardment there was an honourable end to the siege; Verdugo surrendered the city and marched out under thehonours of war.^[2]

Casimir made a triumphant entry into the city – Protestants defectors were soon arrested. Oldenzaal was a strategic place for the republic and the fortress walls despite the protests of the cityburghers were demolished. However, parts of the old medieval remained, the city wall and parts of the canals were maintained in order to defend against mutinous troops. The following yearGroenlo was taken in a two-month siege.^[4]

• Duffy, Christopher (2013).Siege Warfare: The Fortress in the Early Modern World 1494–1660. Routledge.ISBN 9781136607868.
• Israel, Jonathan Irvine (1982).The Dutch Republic and the Hispanic World, 1606-1661. Clarendon Press.ISBN 9780198265344.
• Poot, Anton (2013).Crucial Years in Anglo-Dutch Relations (1625-1642): The Political and Diplomatic Contacts. Uitgeverij Verloren.ISBN 9789087043803.

• Conflicts in 1626
• 1626 in the Dutch Republic
• 1620s in the Habsburg Netherlands
• Anglo-Spanish War (1625–1630)
• Eighty Years' War (1621–1648)
• Sieges of the Eighty Years' War
• Sieges of the Thirty Years' War
• Sieges involving England
• History of Overijssel
• Oldenzaal
• Battles of the Thirty Years' War involving England
• Battles of the Thirty Years' War involving Spain
• Battles of the Thirty Years' War involving the Dutch Republic

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• Articles with short description
• Short description matches Wikidata
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