On 1 March 1815 Napoleon, who had been exiled on Elba, landed at Cannes with some of his guards. Fresnel was so upset by this turn of events that he left his engineering job and offered to fight for the King against Napoleon.
Sa 1 Mar 1815 Napoleon, na na-desterado sa Elba, lupain at Cannes sa ilang ng kanyang guards. Fresnel ay para mapataob ito sa pamamagitan ng turn of events na siya sa kanyang kaliwa engineering trabaho at inalay sa labanan para sa King laban Napoleon.