Despite their numerical superiority, the combined forces led by Biron and Sir John Norreys, who commanded the English infantry along with the Welsh Captain Roger Williams, the just officer who put some order in defending the Spanish attack, were literally swept away by the Spanish cavalry, and then by the infantry, suffering heavy losses, thanks also to the bombardment success of the guns of Don Hernando de Acosta, Lieutenant-General of the artillery of the Army of Flanders, who had a very important role in the battle.
The forces of Biron and Norreys suffered at least 3,200 casualties, and almost all the baggage, barrels of gunpowder, 36 flags, and 3 banners captured.
On the Spanish side the casualties were 400 dead or wounded.
The French Marshal himself, who tried to repel the attack of the Spaniards, fell from his horse and broke his leg.

The combined army was virtually destroyed and retreated in disarray to the fortress of Bergen op Zoom and other towns controlled by the Dutch rebels, and the Spanish troops took with little opposition Steenbergen.
A few days later, the lack of pay and the differences between the French soldiers (mostly Catholics) and the Dutch and English Protestant troops (even the differences between the Dutch and English commanders), ended with hundreds of desertions among Biron's troops.
Despite their numerical superiority, the combined forces led by Biron and Sir John Norreys, who commanded the English infantry along with the Welsh Captain Roger Williams, the just officer who put some order in defending the Spanish attack, were literally swept away by the Spanish cavalry, and then by the infantry, suffering heavy losses, thanks also to the bombardment success of the guns of Don Hernando de Acosta, Lieutenant-General of the artillery of the Army of Flanders, who had a very important role in the battle. The forces of Biron and Norreys suffered at least 3,200 casualties, and almost all the baggage, barrels of gunpowder, 36 flags, and 3 banners captured. On the Spanish side the casualties were 400 dead or wounded. The French Marshal himself, who tried to repel the attack of the Spaniards, fell from his horse and broke his leg.
The combined army was virtually destroyed and retreated in disarray to the fortress of Bergen op Zoom and other towns controlled by the Dutch rebels, and the Spanish troops took with little opposition Steenbergen. A few days later, the lack of pay and the differences between the French soldiers (mostly Catholics) and the Dutch and English Protestant troops (even the differences between the Dutch and English commanders), ended with hundreds of desertions among Biron's troops.
Battle of Steenbergen (1583)