Summary
The Treaty of Aix-la-Chapelle, also known as the Treaty of Aachen, ended the War of Austrian Succession in Europe and King George’s War in North America on October 18, 1748, by largely restoring European territories to their prewar owners under the principle of “status quo ante bellum.” The treaty confirmed the succession rights of the House of Hanover in Britain and its German lands, and upheld the Pragmatic Sanction, which guaranteed Austrian territories to Maria Theresa. However, the treaty recognized Prussia’s seizure of Silesia, weakening Austria and elevating Prussia as a major European power. The settlement failed to resolve Anglo-French rivalry overseas, returned Louisbourg to France, and failed to resolve tensions that led to the French and Indian War (1754–1763).
Essential Facts
- Also Known As: Treaty of Aachen.
- Date: October 18, 1748.
- Ended: War of Austrian Succession, King George’s War.
- Part of: King George’s War (1744–1748), Colonial Wars.
Key Provisions
- The agreement suspended fighting between rival European coalitions.
- Britain agreed to restore Louisbourg to France.
- France withdrew from the Low Countries.
- Maria Theresa was confirmed as Empress of Austria.
- Austria conceded Silesia to Prussia.
Significance
The Treaty of Aix-la-Chapelle is important to American History because it ended King George’s War in North America. However, it also created outrage among American colonists when it restored Louisbourg to French control after New England forces had captured it during the war.
History
The Treaty of Aix-la-Chapelle was signed on October 18, 1748, in Aix-la-Chapelle, also known as Aachen, Germany. It ended the War of Austrian Succession (1740–1748) in Europe and King George’s War (1744–1748) in North America.
- The agreement followed the principle of “status quo ante bellum,” meaning most territories returned to the nations that held them prior to the war.
- The treaty confirmed that King George II and the House of Hanover kept their succession rights in both their German territories and in Britain.
- The treaty failed to settle the rivalry between Britain and France in the West Indies, Africa, and India.
AHC Note
- Britain and Spain agreed to set the boundary between Georgia and Florida at the St. Johns River. This resolved issues between the two nations that led to the War of Jenkins’ Ear (1739–1748).
Territorial Provisions
- The treaty upheld the Pragmatic Sanction (1713) and guaranteed Maria Theresa’s right to retain control of the main Austrian territories. However, her power in Europe was weakened because the treaty also formally recognized Prussia’s seizure of the Austrian province of Silesia.
- Prussia’s control of Silesia marked its emergence as a major European power and strengthened its political and military influence.
- The treaty granted Parma, Piacenza, and Guastalla in Italy to Don Philip, the son of King Philip V of Spain, while his brother Charles (later Charles III of Spain) kept Naples and Sicily.
- French control of the fortress at Louisbourg on Cape Breton in Nova Scotia was restored.
- British control of the city of Madras (present-day Chennai, India) was restored.
AHC Notes
- War of the Austrian Succession (1740–1748) — The War of the Austrian Succession was a European conflict fought over the succession to the Habsburg crown of Austria. It involved Great Britain, France, and Spain and extended to North America as the War of Jenkins’ Ear and King George’s War.
- Pragmatic Sanction of 1713 — An edict issued by Charles VI, the Holy Roman Emperor, ensuring that territories controlled by the Habsburg Empire could be inherited by a daughter.
- Habsburg Empire — The Habsburg Empire was a powerful European dynasty that controlled vast territories from the late Middle Ages into the early 20th century. At its height, it ruled lands across Central Europe, Spain, the Netherlands, parts of Italy, and the Americas. The Habsburgs were staunch defenders of Catholicism during the Reformation and played a central role in European politics, especially through the Holy Roman Empire. Their rule influenced events such as the Thirty Years’ War and the colonization of the New World. Dynastic marriages, military alliances, and political diplomacy helped maintain their power for centuries.
- Holy Roman Empire — The Holy Roman Empire was the name applied to a loose political entity in Central Europe that existed from 800 to 1806, starting with the coronation of Charlemagne by Pope Leo III. It was a confederation of German, Italian, and other territories under the authority of the Holy Roman Emperor. The Empire played a key role in defending Catholicism during the Reformation and in shaping European diplomacy. Its decentralized nature led to frequent internal conflicts, limiting its ability to act as a unified power.
- Maria Theresa (1717–1780) — Maria Theresa was the daughter of Charles VI, the Holy Roman Emperor. She succeeded him upon his death in 1740, leading to Frederick the Great of Prussia invading Silesia, part of the Habsburg Empire, and starting the War of the Austrian Succession. Maria Theresa was a devout Catholic who often expelled non-Catholics from the empire.
American Reaction to the Return of Louisbourg
The return of Louisbourg to France angered American colonists because the fortress controlled access to the St. Lawrence River, New France’s main supply route. The fortress served as a base for French Privateers who attacked New England merchant ships, threatening the economy.
- During King George’s War, American colonial leaders organized a major military effort against the fortress of Louisbourg.
- In May and June 1745, about 4,000 colonial troops, led by William Shirley and William Pepperrell, laid siege to and captured Louisbourg.
- The French tried to retake the fortress twice, but failed.
Britain’s decision to return Louisbourg to France without consulting the Americans led to outrage in the American Colonies. Britain responded by agreeing to reimburse the colonies for the cost of the Louisbourg Expedition. However, this did not ease growing frustration over how Britain was treating the colonies.
Ultimately, the Treaty of Aix-la-Chapelle temporarily paused the struggle between France and Britain for control of North America. This intense rivalry, which included four separate wars, finally ended with the British victory in the French and Indian War.
AHC Notes
- Colonial frustration increased distrust of Britain and increased the idea that Americans might need to manage their own defense and political affairs.
- During King George’s War, British officers also treated American officers and troops poorly, which led to more distrust and tension.
- By the time the Seven Years’ War started, France and Britain were already engaged in the French and Indian War
Outbreak of the Seven Years’ War
- Maria Theresa sought to regain Silesia, and her efforts to build an alliance against Prussia contributed to the renewal of war in 1756.
- Frederick II launched a preemptive attack on Austria in 1756, starting the conflict known as the Third Silesian War or the Seven Years’ War.
AP US History
Definition
Treaty of Aix-la-Chapelle (1748) — A peace agreement that ended the War of Austrian Succession by restoring most territories to their prewar owners under the principle of “status quo ante bellum.” The treaty confirmed Hanoverian succession in Britain, upheld Maria Theresa’s Austrian claims while recognizing Prussia’s control of Silesia, returned Louisbourg to France, and failed to resolve Anglo-French rivalry in North America, setting the stage for the French and Indian War.
Alignment
The Treaty of Aix-la-Chapelle is part of the following units, topics, and chapters in the AP US History curriculum:
Appendix
The Four French and Indian Wars
In North America, France and Britain clashed over territory, the Fur Trade, and alliances, including those with the Creek, Cherokee, and Iroquois Confederacy, among others. This led to four wars:
- King William’s War (1689–1697) — The first conflict in North America between England, France, and their respective Indian allies. There was no clear victor in the war, which was an extension of the Nine Years’ War. However, it set the stage for future conflicts in North America between the European powers as they fought for control of the Fur Trade and dominance of the continent.
- Queen Anne’s War (1702–1713) — The second conflict in North America between England, France, and their respective Indian allies. Ultimately, England gained significant territory in Canada and secured the rights to the Spanish Asiento System, which was the North American extension of the War of the Spanish Succession. However, the Treaty of Utrecht failed to clearly establish the border between New France and New England, a factor that contributed to the outbreak of King George’s War.
- King George’s War (1744–1748) — The third major conflict in North America between England, France, and their respective Indian allies. It was the North American extension of the War of the Austrian Succession. During the war, British forces under the command of Massachusetts Governor William Shirley successfully captured Fort Louisbourg at the mouth of the St. Lawrence River. The fighting ended on October 18, 1748, when the Treaty of Aix-la-Chapelle was signed by Britain, France, and the Dutch Republic. In the agreement, all territories were restored, including Fort Louisbourg, which was returned to New France.
- French and Indian War (1754–1763) — The most significant of the intercolonial wars between the American Colonies and New France was the French and Indian War. It was the Fourth Intercolonial War, which overlapped with the Seven Years’ War in Europe. The fighting in North America actually started two years before it did in Europe when George Washington led a surprise attack on a French expedition in Pennsylvania at the Battle of Jumonville Glen. In 1759, the British defeated the French outside of Quebec at the Battle of the Plains of Abraham and gained control of French territory in Canada, essentially ending the conflict in North America.
