Flemish town militias destroyed the French royal cavalry outside Kortrijk on 11 July 1302, stripping some five hundred pairs of gilded spurs from the dead and giving the battle its name.
The Battle of Courtrai, fought outside Kortrijk on 11 July 1302, is the battle in which the richest urban society in northern Europe destroyed a French royal army with its own townsmen. Philip IV had annexed Flanders in all but name; the towns rose in May, massacred the French garrison of Bruges, and in July met the army sent to punish them on ground of their own choosing, laced with brooks and drainage ditches that no cavalry charge could cross in order.
They killed Robert II of Artois, the Constable of France, two Marshals and some seventy-five other nobles, took no prisoners, and hung about five hundred pairs of gilded spurs stripped from the dead in the church of Our Lady in Kortrijk. The result stunned Europe. It did not, however, win the war: the same towns were beaten at Mons-en-Pévèle two years later, and the peace of 1305 cost Flanders Lille, Douai and Béthune and a crushing indemnity.
Flanders was a French fief whose wealth depended on English wool, which made its politics permanently unstable. Count Guy of Dampierre allied with Edward I of England in 1297; Philip IV invaded, imprisoned the count and his heir, and by 1300 governed the county directly through Jacques de Châtillon. Direct rule meant new taxes, and it fell hardest on the weavers and fullers who had already been fighting the patrician families that ran the towns.
On 18 May 1302 the guildsmen of Bruges, led by the weaver-dean Pieter de Coninck and the butcher Jan Breydel, killed the French garrison and every Frenchman they could find in the streets before dawn. The killing became known as the Bruges Matins, and it made accommodation impossible. Within weeks most of Flanders was in arms, Guy of Namur and William of Jülich had taken command, and a royal army was mustering to restore order.
The Flemish army placed itself with the town of Kortrijk and its castle behind it, and in front a belt of streams — the Groeningebeek among them — and the ditches of worked farmland. The position could not be turned without a long march, and it could not be charged without first crossing broken, waterlogged ground that forced horses to slow and bunch. That was the whole tactical idea, and the Flemish commanders knew it: they told their men to stand, to kill the horses, and to take no prisoners for ransom.
The militias carried pikes and the goedendag, a heavy iron-shod staff with a spike, which was useless at reach against a lance but lethal against a horse or a man already down. Crossbowmen and about four hundred nobles fighting on foot filled out the line. The idea that the guilds fought as an untrained mob is wrong: militia service was a civic obligation organised by guild, with equipment requirements and musters, and Flanders had been fighting for five years.
The fighting opened with missiles, and the French had the better of it: their thousand crossbowmen pushed the Flemish shooters back, and the French infantry began to press the line. Robert of Artois then made the decision the battle is remembered for. He recalled his own infantry and crossbowmen — who were winning — to clear a lane for the cavalry, and sent the men-at-arms forward across the brooks.
The charge arrived slowed, disordered and in places dismounted by the ditches, and it struck a formation that did not break. Horses went down, riders were killed on the ground with the goedendag, and the Flemish line held long enough for the reserve under Jan van Renesse to come in where the French had bitten deepest. Artois rode into the centre himself, reached the Flemish banner, and was pulled down and killed. With him died the Constable Raoul de Nesle, two Marshals, Jacques de Châtillon and some seventy-five other lords; the French lost over a thousand men, the Flemish a few hundred.
The name comes from a real trophy. Gilded spurs were knightly equipment, and about five hundred pairs taken from the French dead were hung in the church of Our Lady in Kortrijk as an offering. The French took them back after they won at Mons-en-Pévèle in 1304, which is a useful corrective to the way the story is usually told. The Dutch name Guldensporenslag and the battle’s standing as a national symbol are far later: Hendrik Conscience’s novel The Lion of Flanders of 1838 made it the founding myth of the Flemish movement, and 11 July became the Flemish Community’s official holiday only in 1973.
The other familiar reading — that common infantry beat the flower of chivalry and ended the age of the knight — needs the same care. Flemish knights and nobles fought in the line and commanded it; the terrain did as much as the goedendag; and the decisive error was French, when Artois withdrew infantry that was already winning. Heavy cavalry was not made obsolete in 1302, as the same French army demonstrated two years later. What Courtrai proved is narrower and still important: disciplined foot on chosen ground, told to hold and given a reason to, could destroy a mounted charge.
The immediate result was total. French administration in Flanders collapsed, the towns took the government of the county, and Philip IV had to fight for four more years to recover his position. But the French crown had more men and more money, and it used both: the Flemish were checked at Arques in 1303, beaten at sea off Zierikzee in 1304, and defeated at Mons-en-Pévèle in August 1304, where William of Jülich was killed.
The Treaty of Athis-sur-Orge in June 1305 set the terms. Flanders kept its count and its identity as a fief rather than a province, which is what the rising had been about; it paid an enormous indemnity, accepted the destruction of Bruges’s walls, and lost Lille, Douai and Béthune to the royal domain. The county that had humiliated the French monarchy in 1302 spent the next generation paying for it, and the grievance fed straight into the Flemish alliances with England at the opening of the Hundred Years’ War.