Jules Guérin (14 September 1860 – 10 February 1910) was the founder and leader of the French Ligue Antisemitique, an organisation similar to the Ligue des Patriotes. The Ligue was involved in many anti-semitic and anti-Dreyfus protests during the Dreyfus Affair. Guérin was indicted, with Déroulède and his Ligue de Patriotes for conspiring against the State. Guérin refused to be taken and fortified his house in the Rue Chabrol. After 23 days of siege, he eventually gave himself up. The term "Fort Chabrol" for a siege situation is still in use in some French-speaking countries, even among law enforcement agencies. The Ligue was outlawed in November 1899 and Guérin was imprisoned for ten years.