Rhine 1792–1796 In 1792, he became proprietor of the
Mészáros Uhlan Regiment (this became # 1 in 1798) and held this dignity until 1797. The mounted lancer unit was formed by combining two uhlan squadrons each from the
Kaiser,
Karaczay,
Levenehr, and
Lobkowitz Chevauxleger Regiments. He was awarded the Knight's Cross of the
Military Order of Maria Theresa on 25 October 1793 for his distinguished service. In 1794, he served in
Friedrich Freiherr von Hotze's corps. Promotion to
Feldmarschall-Leutnant came on 4 March 1796 after more service with the Army of the Upper Rhine under Wurmser and
Maximilian Baillet de Latour. He received the Commander's Cross of the Military Order of Maria Theresa on 11 May.
Italy 1796–1797 Immediately after Ettlingen, Mészáros went to Italy, where Wurmser had replaced
Johann Beaulieu as commander-in-chief. During the first relief of the
Siege of Mantua, the army commander assigned Mészáros to lead IV Column. This force moved down the
Brenta River valley to
Bassano del Grappa at the end of July. From there, he approached
Mantua from the northeast via
Vicenza. Unfortunately, this left the IV Column remote from the action during a critical phase of operations. When Mészáros' troops finally arrived near Mantua, Wurmser ordered him to observe the French division that had just raised the siege of that fortress. But Pascal Fiorella's division got off to an early start on 5 August and Mészáros was unable to intercept it. Fiorella's attack against the left rear of the Habsburg army helped Bonaparte win the
Battle of Castiglione. At the beginning of the second relief of Mantua, Mészáros lay west of Bassano with a division of 10,673 soldiers. Unexpectedly, Bonaparte defeated Austrian forces at the
Battle of Rovereto in the
Tyrol. Then the main French army moved east and south down the Brenta valley to defeat Wurmser at the
Battle of Bassano on 8 September. Instead of retreating to the east, Wurmser moved southwest to unite with Mészáros and marched hard for Mantua. The Austrians evaded Bonaparte's pursuit and reached the fortress, though the French forced them to fight a costly battle at
La Favorita Palace on 15 September. After this, Mészáros and his soldiers suffered through the long Siege of Mantua before Wurmser surrendered to Bonaparte on 2 February 1797. ==Later career==