Battle of the Slaak

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Battle of the Slaak
Part of the Eighty Years' War
Battle at the Slaak, 12 and 13 September 1631
Date 12 and 13 September 1631 Location Slaak of Volkerak channel near Goeree-Overflakkee (present-day the Netherlands) 51°37′52″N 4°12′01″E / 51.6312°N 4.2004°E / 51.6312; 4.2004 Result Dutch victory
Belligerents
Spain	United Provinces
Commanders and leaders
Don Marquis of Aytona Count Jan van Nassau Siegen	Vice-Admiral Marinus Hollare
Strength
5,500 soldiers, 35 ships, 60 vessels	50 vessels
Casualties and losses
83 vessels sunk, destroyed or captured, 1,500 killed, wounded or drowned, 4,000 prisoners	Light

The naval Battle of the Slaak (12 and 13 September 1631) was a Dutch victory during the Eighty Years' War. The Dutch prevented the Spanish army from dividing the Dutch United Provinces in two.