Answer:
Haiti are located in the Caribbean, across the Atlantic Ocean which disabled France to sent new troops to suffocate rebellion. At the end of 18th and the beginning of 19th Century you needed months to come from Europe to Haiti and information were traveling slow. Therefore it was hard for France to end the Revolution as they weren't prepared to send fresh troops.
Explanation:
We need to take into account that Haitian revolution started after great changes that happened in France during their revolution. Therefore France wasn't able to focus on the situation on the island. As France was involved in many conflicts in that period across Europe they failed to preserve their colonies across the Ocean.
