Siege of Sluis (1604) | |||||||||
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Part of the Eighty Years' War and the Anglo–Spanish War | |||||||||
The capture of Sluis by the Dutch and English army in 1604 from the Atlas Van Loon | |||||||||
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Belligerents | |||||||||
Dutch Republic England | Spain | ||||||||
Commanders and leaders | |||||||||
Maurice of Orange Horace Vere William Louis |
Ambrogio Spinola Luis de Velasco Mateo Serrano | ||||||||
Strength | |||||||||
11,000[1] |
15,000[6] 4,200 (Sluis)[Note A] | ||||||||
Casualties and losses | |||||||||
800 casualties, sick or dead to disease[2] |
2,000 casualties, sick or dead to disease[Note B] 5,800 captured[Note C] 10 galleys[7] 15 assorted ships[8]: 148 1,400 slaves released[6] |
The siege of Sluis (1604), also known as the Sluis campaign or the Battle of the Oostburg Line, was a series of military actions that took place during the Eighty Years' War and the Anglo–Spanish War from 19 May to 19 August 1604.[9] A States and English army under Prince Maurice of Orange and Horace Vere respectively crossed the Scheldt estuary and advanced on land taking Cadzand, Aardenburg, and IJzendijke in the Spanish Netherlands.[10] This soon led to the culmination of the siege of the Spanish-held inland port of Sluis.[4][11]
Initially it was hoped that with Ostend under siege for three years by the Spanish, an attempted relief by Maurice's army could be achieved.[12] Even though Ostend would finally fall into the hands of the Spanish, Sluis, an important stronghold itself, was eventually captured after tough fighting which included the defeat of a Spanish relief force under Ambrogio Spinola and Luis de Velasco.[2][5]