Louis was more concerned with being diligent about payments to France than his grandfather was, and so he raised taxes to cover the payments. That move, and his Franco-phile attitude, turned the general population of Flemings against him.
Resentment against the Count of Flanders started manifesting as small rural riots in late 1323—poor harvests that year contributed to the unrest—and ultimately boiled over into an organized rebellion that lasted until 1328. A rich farmer from Lampernisse named Nicolaas Zannekin organized his neighbors and other rebels and captured various towns, including Nieuwpoort, Ypres, and Kortrijk. In Kortrijk, they went so far as to capture Robert, the Count of Flanders. Louis was released on 30 November 1325 after promising amnesty to all the members of the rebellion; Louis fled to Paris the next day.
In April 1326, King Charles IV of France got involved, as their ruler (technically, but not in the eyes of Flanders' citizens). The Peace of Arques he established did not last.
The rebellion expanded, and gained a new leader, the mayor of Bruges, William Deken. Deken had become mayor in February 1328 when Bruges rejected the Count's appointed city magistrate and appointed its own officials. That June, Deken traveled to England to persuade the young King Edward III that he should renew his claim to the throne of France. (Clearly, he wished to distract France, Louis' strongest ally.)
King Charles of France died 21 February 1328, and King Philip VI organized an expedition into Flanders to end the rebellion once and for all. They met at the Battle of Cassel (pictured above), where the rebels were defeated and Nicolaas Zannekin was killed. William Deken fled to Brabant and looked for help from Duke John III, but John wanted nothing to do with the conflict and handed Deken over to France, where he was taken to Paris and convicted of high treason. After cutting off his hands, he was dragged through the streets and then hanged.
Back in Flanders, Count Louis confiscated the property of the conspirators; cities that cooperated were forced to pay heavy fines. The fortifications of Bruges, Ypres, and Kortrijk were destroyed so that they could never again resist an army.
..and so ended the Flemish revolt. That time. When the Hundred Years War started a decade later, Louis stayed pro-French, even though Flanders' wool trade relied heavily on England. England boycotted Flanders wool, and a new revolt started. This was too much for Louis, who fled Flanders for good and was killed in 1346 at the Battle of Crécy, fighting for the French.
If you spend any amount of time on the economy of Western Europe in the Middle Ages, you will learn that one of the most common and important phrases is "the wool trade." You can guess tomorrow's topic.