I don`t need to read N`s propaganda.
This disputes that claim.

Obituary on the Marquis de Chasteler (Archiv für Geschichte, Statistik, etc. Vienna, 1825, No. 65)
Jean Gabriel, Marquis de Chasteler-Courcelles, owner of the Styrian regiment of infantry, No. 27, and commander of Venice, was born in 1763, in Mons, Belgium. On leaving the College of Metz, he entered the Academy of Engineering at Vienna, and took service in Austria. In the war against the Turks, in 1788, he had a shattered leg in the battle of Poduchan, Moldavia; he attended the bloody days of Ishmael and Kilianova. In 1789 and 1790 he was employed in negotiations with the Grand Vizier, and worked during the Armistice on the Wallachian military map. Appointed by Leopold II, lieutenant-colonel of the Walloon Guard, he commanded the castle at Namur, in 1793, when he was obliged to go to General Valence. After his exchange, he attended the sieges of Quesnoy and Maubeuge, and received at Wattignies, where he commanded 4 squadrons of Cobourg dragons, 8 bayonets. It was he who, after the battle of Fleurus, defended Liege against the army of Sambre-et-Meuse. He then directed the works of Mainz, and served as quartermaster-general, which earned him the rank of colonel. He was then charged with the demarcation work of the Polish provinces added to the Austrian monarchy. After the Treaty of Campo-Formio, he received a similar mission for the demarcation of the Cisalpine Republic. In 1789 he made the campaign of Italy as Quartermaster-General, and contributed to the success of Kray at Verona, as well as those of Verderio on the Adda; on the 10th of June, he opened the trench in front of the citadel of Turin, attended the battle of the Trébia, directed the siege of Alexandria and there was badly wounded. In 1800, he was appointed second quarter-master-general to the army of Germany, defended, at the head of a brigade, the parades of Scharnitz in Tyrol. Promoted to Field Marshal Lieutenant, in 1802, he organized, from that time, the Landsturm and the militia of Tyrol. In a trip to Paris, he obtained the lifting of the sequestration of his property in Belgium. In the war of 1805 he commanded a division in Tyrol and retired by Gratz to Hungary. A few years later, Austria preparing for a new war, Chasteler received an order to repair the fortifications of Comorn on the Danube, and when it broke, he went to take command of the Tyrol, fought fierce battles with the French, forced Baraguay Retiliers, and delivered a large part of the Tyrol. Irritated by these setbacks,
Newsletters accused him of having murdered French conscripts from his native town. The author of the chronological notice rejects this odious accusation, and maintains that Chasteler always took a good deal of care of sick prisoners. However that may be, finally beaten by Marshal Lefevre, he withdrew from the Brenner on Raab. In 1811 and 1812 he commanded in Austrian Silesia, and in 1813 he put the place of Prague in a state of defense. At the battle of Dresden he commanded a body of grenadiers, and was ordered afterwards to assemble various garrisons of Bohemia, to support the Russian army corps of Tolstoy. Since then he has successively commissioned Theresienstadt and Venice; he put the last of these cities in a state of defense, when in 1815 Murat went to Upper Italy. Chasteler died in Venice on May 7, 1825. He had received 14 wounds; in spite of his short sight, which often exposed him to dangers, notwithstanding glasses and a wand, he was everywhere where the danger appeared. Austria did not have a more active defender, France a more bitter enemy.