He wholeheartedly joins the French Revolution and creates a military unit : the American hussars regiment composed of blacks and half-breeds and named : Saint-George legion. He stops General Dumourriez the ex winner of the battle of Valmy who has turned against the Revolution.
This first black colonel of the French army will pay
a high price for his contribution to the French Revolution.
Abandoned by his protectors, he will go on as an orchestra leader but will live modestly compared to the luxury life he led under royalty. He will die in 1799 aged 60. « The Voltaire of music » says the abbé Grégoire, « Watteau of music » for La Laurencie, Saint-George in his time was highly praised in Paris – and London maybe – more than Mozart. He appears today as one of the major shipwrecked personalities of history.