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Loon War

Loon War
Gravinne Ada op de burgt te Leijden belegerd.jpg
William's troops besiege Ada in the Fortress of Leiden. Reinier Vinkeles (1785).
Date 1203 – 1206
Location Holland and Zeeland
Result Military victory for William
Treaty of Bruges (diplomatic victory for Louis)
Long-term political victory for William
Territorial
changes
Counties of Holland and Zeeland temporarily divided between William and Louis
Belligerents
Armoiries Comtes de Looz.png Loon
Supported by:
Arms of the Kings of France (France Ancien).svg France
Hohenstaufen family arms.svg Staufen
Blason Nord-Pas-De-Calais.svg Flanders
Limburg Old Arms.svg Limburg
Armoiries Brabant.svg Brabant
Coat of Arms of the Bishopric of Utrecht.svg Utrecht
Armoiries Principauté de Liège.svg Liège
Counts of Holland Arms.svg Holland
Supported by:
Royal Arms of England.svg England
Emperor Otto IV Arms.svg House of Welf
Commanders and leaders
Armoiries Comtes de Looz.png Louis II of Loon
Counts of Holland Arms.svg Ada of Holland
Coat of Arms of the Bishopric of Utrecht.svg Dirk van Are
Hohenstaufen family arms.svg Philip of Swabia
Counts of Holland Arms.svg William of Frisia
Egmond stamwapen.svg Walter of Egmont
Royal Arms of England.svg John Lackland
Emperor Otto IV Arms.svg Otto IV

The Loon War (Dutch: Loonse Oorlog) was a war of succession over the County of Holland (and its dependency Zeeland) from 1203 until 1206, brought on by the death of count Dirk VII. The war was waged between Dirk's brother William of Frisia, and Dirk's daughter Ada who had quickly married count Louis II of Loon.

Count Dirk VII of Holland passed away on 4 November 1203, having fathered only daughters, with only Ada surviving him. On his deathbed, he declared he wanted to discuss his succession with his brother William of Frisia. However, his wife, countess Adelaide of Cleves, who had already fought a battle near Alkmaar against the rebellious William in 1195, wanted Ada to receive the inheritance instead. Because Holland and Zeeland were so-called "sword fiefs" and not "spindle fiefs", Ada, as a woman, had no right to inherit the counties, but Adelaide tried to accomplish this anyway by quickly finding a husband for Ada. Even before her father was buried, the 15-year-old Ada wed count Louis II of Loon, as arranged by her mother. On the way to her father's funeral, she ran into her uncle William's henchmen, after which she entrenched herself in the Fortress of Leiden.

The war of succession took on an international scope: Ada and Louis allied themselves with France and the German house of Hohenstaufen, William joined up with Engeland and the German house of Welf. In the background, a struggle for the throne of the Holy Roman Empire was taking place between the Welf Otto IV of Brunswick and the Stauf Philip of Swabia. This meant that the emperor or overlord was unable to determine the fate of the events in his Dutch provinces. Well-known noblemen from Holland who joined forces with the Loon camp were Gisbert II of Amstel, Floris Herbaren van der Lede, Folpert II van der Lede, Hugo of Voorne, Rogier van der Meere and Otto of Voorn; William was supported by Walter of Egmont, Albert II Banjaert, Philip of Wassenaar, James of Leiden, Simon of Haarlem, William of Teylingen, Jan of Rijswijk and Otto of Bentheim.


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