Tired of being sexually abused and treated harshly by Master Bellac, Flore managed to escape the plantation in 1793. She took refuge in the forested hills, where she met the Maroons. There, she joined the Armée Française Dans Les Bois, made up of Maroons, French revolutionaries and English deserters.

The army planned a rebellion to rid the country of the British and declare Saint Lucia a free country.

During the infamous Battle of Rabot of 1795, they attacked planters and torched the estates. They destroyed seven of the eleven towns and villages; only Castries, Soufriere, and Gros Islet were spared. It is said that Flore killed her former master and burned down his plantation.

With the support of Jean-Baptiste Victor Hugues, Flore and her army joined the Brigands War, which saw the total defeat of the British on 19 June 1795.

The British and the Royalist planters fled the island, and the Saint Lucians enjoyed a year of freedom from slavery.

There is no record of Flore Bois Gaillard after the war, so it is not known whether she escaped or died in battle.