Franz Moritz Graf von Lacy (; ; , tr. ; 21 October 1725 – 24 November 1801) was an

Austrian Austrian may refer to: * Austrians, someone from Austria or of Austrian descent ** Someone who is considered an Austrian citizen * Austrian German dialect * Something associated with the country Austria, for example: ** Austria-Hungary ** Austria ...

military leader of

Baltic German Baltic Germans ( or , later ) are Germans, ethnic German inhabitants of the eastern shores of the Baltic Sea, in what today are Estonia and Latvia. Since Flight and expulsion of Germans (1944–1950), their resettlement in 1945 after the end ...

and Irish origins. He was the son of Count Peter von Lacy, and was a famous Austrian

field marshal Field marshal (or field-marshal, abbreviated as FM) is the most senior military rank, senior to the general officer ranks. Usually, it is the highest rank in an army (in countries without the rank of Generalissimo), and as such, few persons a ...

. Lacy served during the reign of

Maria Theresa Maria Theresa (Maria Theresia Walburga Amalia Christina; 13 May 1717 – 29 November 1780) was the ruler of the Habsburg monarchy from 1740 until her death in 1780, and the only woman to hold the position suo jure, in her own right. She was the ...

, and was a close friend to

Joseph II, Holy Roman Emperor Joseph II (13 March 1741 – 20 February 1790) was Holy Roman Emperor from 18 August 1765 and sole ruler of the Habsburg monarchy from 29 November 1780 until his death. He was the eldest son of Empress Maria Theresa and her husband, Francis I, ...

, becoming one of the latter's advisers. He was made a count of the Holy Roman Empire, while his father had been a count of the Russian Empire. Newerkla, Stefan Michael (2020), "Das irische Geschlecht O'Reilly und seine Verbindungen zu Österreich und Russland" he Irish O'Reilly family and their connections to Austria and Russia In: ''Diachronie – Ethnos – Tradition: Studien zur slawischen Sprachgeschichte iachrony – Ethnos – Tradition: Studies in Slavic Language History'' Eds. Jasmina Grković-Major, Natalia B. Korina, Stefan M. Newerkla, Fedor B. Poljakov, Svetlana M. Tolstaja. Brno: Tribun EU, pp. 259–27
(accessible online)
here pp. 259–261.

Early life

He was born as the son of Count Peter von Lacy and his second wife, Margareta Filippina von Funcken-Lösern (1685–1759), widowed Countess Frölich. His father was a Russian

Field Marshal Field marshal (or field-marshal, abbreviated as FM) is the most senior military rank, senior to the general officer ranks. Usually, it is the highest rank in an army (in countries without the rank of Generalissimo), and as such, few persons a ...

who belonged to the Irish branch of the

de Lacy de Lacy (Laci, Lacie, Lascy, Lacey, Lassey) is the surname of an old Norman family which originated from Lassy, Calvados. The family took part in the Norman Conquest of England and the later Norman invasion of Ireland. The name is first reco ...

family and had followed James II into exile. Franz Moritz was born in

St Petersburg Saint Petersburg, formerly known as Petrograd and later Leningrad, is the List of cities and towns in Russia by population, second-largest city in Russia after Moscow. It is situated on the Neva, River Neva, at the head of the Gulf of Finland ...

, and was educated in

Germany Germany, officially the Federal Republic of Germany, is a country in Central Europe. It lies between the Baltic Sea and the North Sea to the north and the Alps to the south. Its sixteen States of Germany, constituent states have a total popu ...

for a military career, and entered the Austrian service. He served in

Italy Italy, officially the Italian Republic, is a country in Southern Europe, Southern and Western Europe, Western Europe. It consists of Italian Peninsula, a peninsula that extends into the Mediterranean Sea, with the Alps on its northern land b ...

Bohemia Bohemia ( ; ; ) is the westernmost and largest historical region of the Czech Republic. In a narrow, geographic sense, it roughly encompasses the territories of present-day Czechia that fall within the Elbe River's drainage basin, but historic ...

Silesia Silesia (see names #Etymology, below) is a historical region of Central Europe that lies mostly within Poland, with small parts in the Czech Silesia, Czech Republic and Germany. Its area is approximately , and the population is estimated at 8, ...

and the

Netherlands , Terminology of the Low Countries, informally Holland, is a country in Northwestern Europe, with Caribbean Netherlands, overseas territories in the Caribbean. It is the largest of the four constituent countries of the Kingdom of the Nether ...

during the

War of the Austrian Succession The War of the Austrian Succession was a European conflict fought between 1740 and 1748, primarily in Central Europe, the Austrian Netherlands, Italian Peninsula, Italy, the Atlantic Ocean and Mediterranean Sea. Related conflicts include King Ge ...

, was twice wounded, and by the end of the war was a lieutenant-colonel. At the age of twenty-five he became full colonel and chief of an infantry regiment.

Seven Years' War

In 1756 with the opening of the

Seven Years' War The Seven Years' War, 1756 to 1763, was a Great Power conflict fought primarily in Europe, with significant subsidiary campaigns in North America and South Asia. The protagonists were Kingdom of Great Britain, Great Britain and Kingdom of Prus ...

he was again on active service, and in the first battle ( Lobositz) he distinguished himself so much that he was at once promoted major-general. He received his third wound on this occasion and his fourth at the battle of

Prague Prague ( ; ) is the capital and List of cities and towns in the Czech Republic, largest city of the Czech Republic and the historical capital of Bohemia. Prague, located on the Vltava River, has a population of about 1.4 million, while its P ...

in 1757. Later in 1757 Lacy bore a conspicuous part in the great victory of Breslau, and at Leuthen, where he received his fifth wound, he covered the retreat of the defeated army. Soon after this began his association with Field-Marshal Daun, the new generalissimo of the empress's forces, and these two commanders, powerfully assisted later by the genius of Laudon, made headway against

Frederick the Great Frederick II (; 24 January 171217 August 1786) was the monarch of Prussia from 1740 until his death in 1786. He was the last Hohenzollern monarch titled ''King in Prussia'', declaring himself ''King of Prussia'' after annexing Royal Prussia ...

for the remainder of the war. Lacy, a lieutenant field-marshal at thirty-two, was made chief of staff (quartermaster-general) to Daun in the newly created general staff. They were cautious to the point of timidity since Leuthen and many other bitter defeats had taught the Austrians to respect Frederick; but, having resolved to wear out the enemy by Fabian methods, they were strong enough to persist to the end. Thus for some years the life of Lacy, as of Daun and Laudon, is the story of the war against Prussia. After

Hochkirch Hochkirch (German) or Bukecy (Upper Sorbian, ) is a municipality in the district of Bautzen, in Saxony, Germany. It is known for the 1758 Battle of Hochkirch, part of the Seven Years' War. The municipality (except Breitendorf) is part of the reco ...

(October 15, 1758) Lacy received the Grand Cross of the

Order of Maria Theresa The Military Order of Maria Theresa (; ; ; ; ; ) was the highest military honour of the Habsburg monarchy, Austrian Empire and Austro-Hungarian Empire. History Founded on 18 June 1757, the day of the Battle of Kolín, by the Empress Maria ...

. In 1759 both Daun and Lacy fell into disfavour for failing to win victories, and Lacy owed his promotion to Feldzeugmeister only to the fact that Laudon had just received this rank for the brilliant conduct of his detachment at

Kunersdorf Kunowice () is a village in the administrative district of Gmina Słubice, within Słubice County, Lubusz Voivodeship, in western Poland, near the Oder river and the German border. It lies approximately east of Słubice, south-west of Gorzów W ...

. He shadowed

's Prussian army during the failed

Siege of Dresden The siege of Dresden took place in July 1760 during the Third Silesian War (part of the Seven Years' War) when a Prussian force led by Frederick the Great unsuccessfully besieged the city of Dresden in Saxony. Frederick had previously occupied ...

in 1760. His responsibilities told heavily on Lacy in the ensuing campaigns, and his capacity for supreme command was doubted even by Daun, who refused to give him the command when he himself was wounded at the

Battle of Torgau In the Battle of Torgau on 3 November 1760, King Frederick the Great's Prussian army fought an Austrian army under the command of Field Marshal Leopold Josef Graf Daun. The Prussians won a costly victory in one of the bloodiest battles of the T ...

Later career

After the

Treaty of Hubertusburg The Treaty of Hubertusburg () was signed on 15 February 1763 at Hubertusburg Castle by Prussia, Austria and Saxony to end the Third Silesian War. Together with the Treaty of Paris, signed five days earlier, it marked the end of the Seven Years ...

a new sphere of activity was opened, in which Lacy's special gifts had the greatest scope.

having placed her son,

Emperor Joseph II Joseph II (13 March 1741 – 20 February 1790) was Holy Roman Emperor from 18 August 1765 and sole ruler of the Habsburg monarchy from 29 November 1780 until his death. He was the eldest son of Empress Maria Theresa and her husband, Emperor F ...

, at the head of Austrian military affairs, Lacy was made a field marshal, and given the task of reforming and administering the army (1766). He framed new regulations for each arm, a new code of military law, a good supply system. As the result of his work the Austrian army was more numerous, far better equipped, and cheaper than it had ever been before. Joseph soon became very intimate with his military adviser, but this did not prevent his mother, after she became estranged from the young emperor, from giving Lacy her full confidence. His activities were not confined to the army. He was in sympathy with Joseph's innovations, and was regarded by Maria Theresa as a prime mover in the scheme for the partition of

Poland Poland, officially the Republic of Poland, is a country in Central Europe. It extends from the Baltic Sea in the north to the Sudetes and Carpathian Mountains in the south, bordered by Lithuania and Russia to the northeast, Belarus and Ukrai ...

. But his self-imposed work broke down Lacy's health, and in 1773, in spite of the remonstrances of Maria Theresa and of the emperor, he laid down all his offices and went to southern France. On returning he was still unable to resume office, though as an unofficial adviser in political and military matters he was far from idle. In the brief and uneventful

War of the Bavarian Succession The War of the Bavarian Succession (; 3 July 1778 – 13 May 1779) was a dispute between the Austrian Habsburg monarchy and an alliance of Electorate of Saxony, Saxony and Kingdom of Prussia, Prussia over succession to the Electorate of Bavaria ...

, Lacy and Laudon were the chief Austrian commanders against the

King of Prussia The monarchs of Prussia were members of the House of Hohenzollern who were the hereditary rulers of the former German state of Prussia from its founding in 1525 as the Duchy of Prussia. The Duchy had evolved out of the Teutonic Order, a Roman C ...

, and when Joseph II at Maria Theresa's death, became the sovereign of the Austrian dominions as well as emperor, Lacy remained his most trusted friend. More serious than the War of the Bavarian Succession was the Turkish war which presently broke out. Lacy was now old and worn out, and his tenure of command therein was not marked by any greater measure of success than in the case of the other Austrian generals. His active career was at an end, although he continued his effective interest in the affairs of the state and the army throughout the reign of Joseph's successor, Leopold II. His last years were spent in retirement at his Neuwaldegg Castle near

Vienna Vienna ( ; ; ) is the capital city, capital, List of largest cities in Austria, most populous city, and one of Federal states of Austria, nine federal states of Austria. It is Austria's primate city, with just over two million inhabitants. ...

. He is buried in a

mausoleum A mausoleum is an external free-standing building constructed as a monument enclosing the burial chamber of a deceased person or people. A mausoleum without the person's remains is called a cenotaph. A mausoleum may be considered a type o ...

in the castle grounds.

Ancestry

His father was the Irish-born Russian field marshal and general, commander of

Saint Petersburg Saint Petersburg, formerly known as Petrograd and later Leningrad, is the List of cities and towns in Russia by population, second-largest city in Russia after Moscow. It is situated on the Neva, River Neva, at the head of the Gulf of Finland ...

and

Veliky Novgorod Veliky Novgorod ( ; , ; ), also known simply as Novgorod (), is the largest city and administrative centre of Novgorod Oblast, Russia. It is one of the oldest cities in Russia, being first mentioned in the 9th century. The city lies along the ...

as well as governor of

Riga Riga ( ) is the capital, Primate city, primate, and List of cities and towns in Latvia, largest city of Latvia. Home to 591,882 inhabitants (as of 2025), the city accounts for a third of Latvia's total population. The population of Riga Planni ...

, Count Pierce Edmond de Lacy (German: ''Peter Graf von Lacy'') (1678–1751).

Early life

Seven Years' War

Later career

Ancestry

See also

References

Further reading