Johann Josef Wenzel Anton Franz Karl, Graf Radetzky von Radetz (; ; ; 2 November 1766 – 5 January 1858) was a Czech nobleman and Austrian field marshal. He served as chief of the general staff in the Habsburg monarchy during the later period of the Napoleonic Wars and afterwards began military reforms. A disciplined and fair man, he was so beloved by his troops that he was known as Vater ('Father') Radetzky. He is best known for the victories at the Battles of Custoza (24–25 July 1848) and Novara (23 March 1849) during the First Italian War of Independence.
Early years
Radetzky, a titled Graf ('Count'), was born into a noble Bohemian military family of Czech origin at Chateau Třebnice () near Sedlčany in Bohemia (now part of the town). His father, Count Peter Eusebius Radetzy von Radetz (1732-1766) died shortly after his birth, while his mother, Baroness Marie Venantia Anna Barbara Josepha Bechinie von Lažan (1738-1772), died while he was still a child. Orphaned at an early age Radetzky was educated by his grandfather, and after the latter's death, he continued at the Theresa Academy in Vienna. The academy was dissolved during his first year's residence in 1785, and Radetzky became a cadet in the Austrian Army. The following year he became an officer, and in 1787 was promoted to first lieutenant in a cuirassier regiment. He served as an adjutant to both Count von Lacy and Field Marshal von Laudon during the Austro-Turkish War of 1787–1791, and in the Austrian Netherlands from 1792 to 1795.
In 1798, he married Countess Franziska von Strassoldo-Grafenberg from Tržič, Carniola (now in Slovenia). On her mother's side, she was a descendant of the Austrian House of Auersperg, which ruled one of the hereditary Habsburg duchies in what is now Slovenia. They had five sons and three daughters, only two of whom outlived their father. Radetzky also had a longstanding romantic relationship with his Italian mistress, Giuditta Meregalli of Sesto San Giovanni. She was 40 years his junior and bore him four children, all of whom took his name and were recognized by Radetzky. Meregalli received extensive letters from him, written during his battles. He was a devout lifelong Roman Catholic.
Napoleonic wars
In 1795 Radetzky fought on the Rhine. The following year he served with Johann Beaulieu against Napoleon in Italy, but disliked the indecisive "cordon" system of warfare which Count von Lacy had instituted and other Austrian generals imitated. His personal courage was conspicuous. At the Battle of Fleurus (1794) he led a party of cavalry through the French lines to discover the fate of Charleroi, and at Valeggio sul Mincio in 1796, with a few hussars, he rescued Beaulieu from the enemy. Promoted to major, he took part in Dagobert Wurmser's Siege of Mantua campaign, which ended in the fall of that fortress. As lieutenant-colonel and colonel he displayed bravery and skill in the battles of Trebbia and Novi (1799). At the Battle of Marengo, as colonel on the staff of Melas, he was hit by five bullets, after endeavouring on the previous evening to bring about modifications in the plan suggested by the "scientific" Anton von Zach. In 1801 Radetzky was made a Knight of the Military Order of Maria Theresa.
In 1805, on the march to Ulm, he received news of his promotion to major-general and his assignment to a command in Italy under the Archduke Charles of Austria. He thus took part in the failed campaign of Caldiero. Peace provided a short respite, which he spent in studying and teaching the art of war. In 1809 he led a brigade in V Corps during the Battle of Eckmühl. Promoted lieutenant field marshal, he commanded a division in IV Corps at the Battle of Wagram. In 1810 he was created a Commander of the Order of Maria Theresa and became Inhaber of the 5th Radetzky Hussars. From 1809 to 1812, as chief of the general staff, he was active in reorganizing the army and its tactical system, but, unable to carry out the reforms he desired owing to the opposition of the Treasury, he resigned his position. In 1813 he was Schwarzenberg's chief of staff and had considerable influence on the councils of the Allied sovereigns and generals. Langenau, the quartermaster-general of the Grand Army, found him an indispensable assistant, and he had a considerable share in planning the Leipzig campaign. He won praise for his tactical skills in the battles of Brienne and Arcis-sur-Aube. He entered Paris with the allied sovereigns in March 1814, and returned with them to the Congress of Vienna, where he appears to have acted as an intermediary between Metternich and Tsar Alexander I of Russia, when the two were not on speaking terms.