Jean-Jacques Louis Philippe Guerrier, Duke of L'Avance, Count of Mirebalais (French pronunciation: [ʒɑ̃ ʒak lwi filip ɡɛʁje]; December 19, 1757[1] – April 15, 1845[2]) was a career officer and general in the Haitian Army who became the president of Haïti on May 3, 1844.

A respected soldier, Guerrier had successfully commanded the southern black army during the Haitian Revolution.

King Henry I gave him the hereditary title of Duke of l'Avancé and Earl of Mirebalais.

In 1844, discontent erupted among rural farmers and cultivators over economic conditions within the country.

[4] The piquets were gradually brought under the command of a former army officer, Louis Jean-Jacques Acaau, who used them to disrupt government control over the south of Haiti.