
The Napoleonic Wars (1803–1815) were a series of global conflicts fought between the French First Republic and First French Empire under Napoleon Bonaparte and a fluctuating array of European coalitions. The wars originated in political forces arising from the French Revolution and the French Revolutionary Wars. Napoleon invaded Austria in 1805, surrounding an Austrian army at the city of Ulm, forcing its surrender, and advancing to Vienna. This was a brilliant strategic move by Napoleon, who had gathered his major force along the French Atlantic coast for a possible invasion of Great Britain. The Austrian army was inadequately equipped, insufficiently trained, and indifferently led. Napoleon defeated the Austrians again at the Battle of Austerlitz in December 1805, after which Austria concluded peace and gave up Venice to Napoleon's Italian kingdom. However, Napoleon never sought to destroy the Austrian Empire, and he never had the power to do so. Instead, he married an Austrian archduchess to ensure a stable alliance with Austria.
| Characteristics | Values |
|---|---|
| Year of invasion | 1805 |
| Reason for invasion | Austria joined an alliance with Britain and Russia to remove the French from the Batavian Republic |
| Napoleon's strategy | March his army quickly into Germany |
| Outcome | Napoleon defeated the Austrian army and occupied Vienna |
| Treaty | Treaty of Pressburg |
| Outcome of the treaty | Austria gave up Venice to Napoleon's Italian kingdom, Tirol to Bavaria, and a number of other lands to Napoleon's clients |
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What You'll Learn

Napoleon's strategic move to march his army into Germany
In 1805, Napoleon made one of his most brilliant strategic moves by marching his army into Germany. This move caught the Austrians off guard as they had anticipated that he would invade Italy, where Archduke Charles had gathered the largest Habsburg force. By marching into Germany, Napoleon was able to surround the Austrian army at the city of Ulm and force their surrender. He then advanced to Vienna, which he took in November 1805. This was a significant victory for Napoleon as it allowed him to control the Danube valley, a major trade route and the main theatre of operations during the war.
Napoleon's decision to invade Germany was influenced by several factors. Firstly, he wanted to prevent the Austrians from invading northern Italy and joining forces with the British, Russians, and Swedes. By marching into Germany, he could cut them off and engage them before they could establish a strong position. Secondly, Napoleon may have been motivated by a desire to secure a more stable alliance with Austria. In 1809, he married Marie-Louise, an Austrian archduchess, which could have been an attempt to improve relations and gain an heir, something his first wife had failed to do.
Furthermore, Napoleon's invasion of Germany was part of a larger strategy to dominate Central Europe and establish French control over the continent. By defeating the Austrians and occupying Vienna, he disrupted their plans to invade Bavaria, a French client state. This move also allowed him to negotiate from a position of strength, forcing the Austrians to sign the Treaty of Pressburg in December 1805, ending their participation in the war. Through this treaty, Austria gave up Venice to Napoleon's Italian kingdom and made other territorial concessions.
However, it is important to note that Napoleon never intended to destroy the Austrian Empire completely. He faced challenges in enforcing his rule over Austria due to the empire's multinational nature and the potential for guerrilla warfare, as seen in Spain. Instead, he sought to dismantle the Holy Roman Empire and establish control through alliances, such as his marriage to the Austrian emperor's daughter, and by appointing allies to rule over the various states within the empire.
Napoleon's strategic move into Germany demonstrated his military genius and contributed to his success in the Napoleonic Wars. By outmaneuvering the Austrians and securing key victories, he established French dominance in Central Europe and advanced his larger goal of dominating the continent.
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Austria's alliance with Russia
The decision of Austria to go to war with France in 1805 was influenced by its belief that an alliance with Russia would deter Napoleon from attacking either of the empires. In 1804, Britain and Russia had signed an alliance, and Austria joined the coalition a few months later. The Austrians believed that even if Napoleon marched east, the Austrian and Russian armies could unite before he could bring his forces to Central Europe. However, Napoleon outmaneuvered them by quickly marching his army into Germany, where the Austrians were inadequately equipped, insufficiently trained, and lacking in numbers. Napoleon defeated the Austrian army at the Battle of Ulm and advanced to Vienna, which he took in November 1805. He then moved into Moravia, where he defeated the remaining Austrian army and the oncoming Russians at the Battle of Austerlitz in December 1805.
After the Battle of Austerlitz, Austria concluded peace with Napoleon through the Treaty of Pressburg, while Russia continued the war. Austria gave up territories in Italy and Bavaria to France and its German allies, and was required to pay an indemnity of 40 million francs. The victory at Austerlitz also allowed Napoleon to create the Confederation of the Rhine, a collection of German states serving as a buffer zone between France and the eastern powers, including Austria, Prussia, and Russia.
During the Napoleonic Wars, Austria and Russia were part of several coalitions against France. The First Coalition, formed in 1792, included Austria, Prussia, Great Britain, Spain, and various Italian states. It was defeated in 1797, leading to the formation of the Second Coalition in 1798, which also included Britain, Austria, and Russia, along with the Ottoman Empire, Portugal, and the Kingdom of Naples. However, this coalition was also defeated by 1801, leaving Britain as the sole opponent of the French Consulate. The Third Coalition, which included Britain, Russia, and Austria, was formed in 1805 but suffered a major defeat at the Battle of Austerlitz.
Despite their alliance during the Napoleonic Wars, Austria and Russia had a history of complex and evolving relations. After the Napoleonic Wars, the two empires maintained a close relationship, with Russia supporting Austria during the Hungarian Revolution of 1848-1849. However, tensions arose during the Crimean War when Austria sided with France, Britain, and the Ottomans, marking a significant shift in its alliances. The Crimean War further distanced Austria from Russia and other European powers, and Austria concluded a Dual Alliance with Germany in 1879, targeting its former ally Russia.
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Austria's inadequate army
Austria's army was inadequate in several ways when it went to war with France in 1805. It was poorly equipped, lacking sufficient training, under strength, and poorly led. The Austrian statesmen had miscalculated, believing that their alliance with Russia would deter Napoleon from attacking. They also believed that even if Napoleon marched east, the Austrian and Russian armies could unite before he could bring his forces to central Europe. However, Napoleon made a brilliant strategic move by quickly marching his army into Germany instead of Italy, where the Austrians had anticipated he would go.
Napoleon's direct leadership played a crucial role in the enthusiasm and performance of his army. He returned to Paris from his campaigns in Spain in the winter of 1808-09 and instructed the main French field commander in southern Germany, Louis Alexandre Berthier, on planned deployments and concentrations for a likely new second front. Napoleon intended to mass 140,000 troops near Regensburg, far north of the expected Austrian attack. However, the Austrian attack came about a week earlier than expected, disrupting French plans.
Despite the element of surprise, the Austrian army faced significant challenges. In April 1805, Austria invaded Bavaria with an army of about 70,000 under Karl Mack von Leiberich. Napoleon countered by surrounding Mack's army at Ulm, forcing its surrender without incurring significant losses. With the main Austrian army north of the Alps defeated, Napoleon occupied Vienna in November 1805. He then advanced into Moravia, where he defeated a remnant of the Austrian army and the oncoming Russians at the Battle of Austerlitz on December 2, 1805.
Austria's inadequate military preparation and strategic miscalculations resulted in a swift defeat at the hands of Napoleon's forces. The Austrians were forced to conclude peace with the Treaty of Pressburg on December 26, 1805, while Russia continued the war. This treaty led Austria to give up Venice to Napoleon's Italian kingdom and make other territorial concessions.
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Austria's surrender and peace treaty
Austria's surrender and subsequent peace treaty with Napoleon came after a series of military defeats and strategic miscalculations by the Austrians.
In 1805, the Austrian army was inadequately equipped, poorly trained, and indifferently led. They believed that their alliance with Russia would deter Napoleon from attacking. However, Napoleon made a brilliant strategic move by marching his army quickly into Germany, surprising the Austrians. He surrounded an Austrian army at Ulm, forcing its surrender, and then took Vienna in November 1805. He then advanced into Moravia, where he defeated the remaining Austrian forces and the oncoming Russians at the Battle of Austerlitz on December 2, 1805.
After this defeat, Austria immediately concluded peace with Napoleon, signing the Treaty of Pressburg on December 26, 1805. Austria gave up significant territory, including Venice to Napoleon's Italian kingdom, Tirol to Bavaria, and other lands to Napoleon's clients. In return, Austria received the former archbishopric of Salzburg, which later became a permanent part of Austria after the Napoleonic Wars.
The next few years saw Austria continue its preparations for war with Napoleon, under the direction of Johann Philipp, Graf (Count) von Stadion. Stadion believed that Austria could not make a long-term accommodation with Napoleon due to the threat he posed to monarchical Europe. He proposed raising large armies, supplemented by trained reserves and militia, to defeat Napoleon. However, Austria's efforts to build a large army were hindered by financial constraints.
In 1809, inspired by the Spanish resistance to Napoleon, Stadion appealed to his people to go to war with France. The Austrian army inflicted Napoleon's first defeat on the field at the Battle of Aspern in May 1809. However, Napoleon quickly regrouped and defeated the Austrians at the Battle of Wagram in July. This led to the Treaty of Schönbrunn (also known as the Treaty of Vienna) in October 1809, where Austria surrendered more territory but maintained its monarchy.
The Treaty of Vienna, signed on October 14, 1809, marked the end of the Austrian campaign of 1809. Austria formally ceded large territories, including Salzburg, Trieste, Carniola, and Croatia, which became part of the French Empire. The treaty also restricted the size of the Austrian army to 50,000 men until peace with Britain was achieved. Despite these concessions, Austria remained a Great Power, and Napoleon even married the Austrian Emperor's daughter.
Overall, Austria's surrender and peace treaties with Napoleon were characterized by significant territorial losses but also a recognition of their continued existence as a monarchy and a Great Power.
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Napoleon's marriage to an Austrian Archduchess
Napoleon invaded Austria in 1805, forcing the country to surrender and sign the Treaty of Pressburg. This treaty gave Venice to Napoleon's Italian kingdom, Tirol to Bavaria, and several other lands to Napoleon's clients. However, he did not attempt to annex or dismantle the Austrian Empire. One reason for this could be that he did not have the power to do so, as it would have resulted in a guerrilla war, similar to the one he faced in Spain. Instead, he married Archduchess Marie Louise of Austria, daughter of Francis II of the Holy Roman Empire (also known as Francis I of Austria), in 1810.
Marie Louise was an Austrian archduchess and a member of the House of Habsburg. She was the eldest daughter of the Holy Roman Emperor Francis II and Maria Theresa of Naples and Sicily. She was also the niece of Marie Antoinette, queen of France. Marie Louise was just 18 years old when she left Vienna to marry Napoleon, only a few months after his divorce from his first wife, Josephine de Beauharnais, due to her infidelity. Napoleon, on the other hand, was looking for a wife with royal blood to cement his empire by producing a male heir. Marie Louise was the perfect candidate, as she was related to practically every ruling dynasty in Europe and had impeccable credentials.
The marriage was arranged in February 1810, with the Austrian statesman Klemens von Metternich playing a key role in suggesting Marie Louise to Napoleon. The wedding took place on April 1-2, 1810, in Paris. Marie Louise's uncle, Archduke Charles, stood in for Napoleon at the altar of the Augustinian Church in Vienna. On March 20, 1811, Marie Louise gave birth to Napoleon's long-desired heir, the King of Rome, who later briefly succeeded him as Napoleon II.
The marriage between Napoleon and Marie Louise brought about a brief period of peace and friendship between Austria and the French Empire, similar to prior alliances between the two royal families. Marie Louise herself had been raised to despise France due to the ongoing conflicts between the two nations. However, she agreed to the marriage and remained loyal to Napoleon even when her father joined Russia in the war against him.
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Frequently asked questions
Napoleon invaded Austria in 1805, as part of the War of the Third Coalition. He was anticipating an Austrian attack and wanted to defeat them before they invaded northern Italy.
Napoleon wanted to invade northern Italy to attack the Austrian armies from behind. He was also seeking to strengthen his political position in France.
Yes, Napoleon successfully invaded Austria. He surrounded an Austrian army at the city of Ulm, forcing it to surrender, and then advanced to Vienna, which he occupied in November 1805.
Napoleon never had the power to destroy the Austrian Empire. Dismantling the Empire would have resulted in a guerrilla war, which France didn't have the manpower to fight. Additionally, dismantling the Empire would have disrupted the stability required for French prosperity.











































