 Dombrowski held this position until 23 May, when he was killed while defending the city barricades.One of the key strategic points around Paris was Fort Issy, south of the city near the Porte de Versailles, which blocked the route of the Army into Paris.The fort's garrison was commanded by Leon Megy, a former mechanic and a militant Blanquist, who had been sentenced to 20 years hard labour for killing a policeman.