Why was the French army finally defeated? Where was the final battle of the Haitian Revolution?

Its failure was a result of a hopelessly divided French political elite, a lack of quality military leadership, rudimentary French military tactics. On the battlefield, France faced a vastly more prepared German army that utilized both more advanced weapons and sophisticated tactics.

In six weeks from 10 May 1940, German forces defeated Allied forces by mobile operations, conquering France, Belgium, Luxembourg and the Netherlands, ending land operations on the Western Front until the Normandy landings on 6 June 1944. Italy entered the war on 10 June 1940.

Explanation:

food and resources were plentiful.

women were encouraged to marry later in life so they could work in factories.