She served in the Haitian army during the Haitian Revolution. Lamartiniére served at the Battle of Crête-à-Pierrot in 1802. She fought in male uniform and made a great impression with her fearlessness and courage.
Lamartiniére is said to have boosted the morale of her colleagues with her bravery.
Later Her life after the independence is unknown. This is unconfirmed but comes from a contemporary source, related by one of the other soldiers at Crête-à-Pierrot, and is considered trustworthy.
Most women participating as soldiers during the revolution remain anonymous, and only a few, of which Lamartiniere is one, have been known in history. Other contemporary examples of women in the Haitian army are Victoria Montou and Sanité Belair.