The Squire Francis War (Dutch: Jonker Fransenoorlog) took place in the County of Holland between November 1488 and August 1490.

[1] A Hook minority captured Rotterdam in early November 1488, and from there attempts were made to get towns and villages to become Hookist.

This faction was led by Frans van Brederode (namesake of this war), a squire and descendant of an illustrious noble family.

Frans revolted against the provincial administration of stadholder John III of Egmont dominated by the Cod.

The three-member committee consisted of Walraven II of Brederode, Jan of Naaldwijk and Zweder of Montfoort.

[2] The men commanded by Frans van Brederode set fire to Delfshaven and Schoonderloo during their plunder in 1488/1489, when they were threatened by their enemies.

Around February 11, 1489, the Siege of Rotterdam was begun and the city got surrounded by closed waterways through Jan III of Egmont, who at some point had 25,000 troops at his disposal.

In June 1490, the Hooks suffered a heavy defeat after a smuggling campaign at the battle of Moordrecht, along and on the Hollandse IJssel.

[2] Frans van Brederode decided to change course a month later and left Rotterdam with a considerably depleted fleet, shortly thereafter Woerden and Montfoort were also captured by Cods.

After Frans was ousted and his war ended, it was evident in Rotterdam that daily life had come to a virtual standstill; for example, the herring fleet had been largely destroyed, and of the originally inhabited houses (1275), only 972 were now habitable.