The Hook and Cod wars (Dutch: Hoekse en Kabeljauwse twisten) comprise a series of wars and battles in Holland between 1350 and 1490. Most of these wars were fought over the title of count of Holland, but the underlying reason was the power struggle of the bourgeois in the cities against the ruling nobility.

The Cod faction generally consisted of the more progressive cities of Holland. The Hook faction consisted for a large part of the conservative noblemen.

The origin of the name is uncertain; perhaps it derives from the arms of Bavaria, that look like the scales of a fish.

Another possible explanation is that the name Cod refers to the fish of the same name. As a cod grow it tends to eat more thus it grows even bigger and eats even more .... The Hook refers to the hooked stick that is used to catch a cod.

Margaret of Bavaria vs William V

After count William IV, Count of Holland was killed in 1345, his sister Margaret inherited the county. She was married to emperor Louis IV of Bavaria, and resided in Bavaria. She appointed their second son William (the later count William V ) as ruler of Holland, which meant that he ruled as her representative.

In 1350, the nobles of Holland asked Margaret to return to Holland. As a reaction, the Cod league was formed in May 23, 1350 by a number of supporters of William. On September 5 of the same year, the Hook league was formed. Soon afterward, these factions clashed, and a civil war began.

Edward III, Margaret's brother in law through her sister Philippa of Hainault, came to her aid, winning a naval engagement off Veere in 1351; a few weeks later the Hooks and their English allies were defeated by William and the Cods at Vlaardingen, an overthrow which ruined Margaret's cause. Edward III shortly afterwards changed sides, and the empress saw herself compelled (1354) to come to an understanding with her son, he being recognized as count of Holland and Zeeland, she of Hainaut. Margaret died two years later, leaving William, who had married Matilda of Lancaster, in possession of the entire Holland-Hainaut inheritance (July 1356).

Jacqueline of Bavaria vs Philip of Burgundy

Although there were a number of smaller fights in the period after 1356, the main battle re-emerged at the death of William VI, Count of Holland and Hainaut in 1417. Both William's brother John and his daughter Jacqueline claimed the county. The Cods chose the side of John, and, after his death, of Philip the Good, Duke of Burgundy, while the Hooks supported Jacqueline.

The result of these battles was that Jacqueline was allowed to retain the titles of countess of Hainaut and Holland, but that Philip would rule the county. Philip was named heir to the county, and Jacqueline, who was childless, was not allowed to remarry without Philip's consent.

The treaty became void when Jacqueline remarried in 1432, and she had to hand her territories over to Burgundy.

See also

• Counts of Hainaut family tree - Counts of Holland family tree