An inheritance contested within days
The War of the Austrian Succession ran from December 1740 to October 1748, triggered when Emperor Charles VI died without a male heir and his daughter Maria Theresa inherited the Habsburg lands under an earlier agreement known as the Pragmatic Sanction, a succession France, Prussia and Bavaria immediately moved to challenge. Prussia’s king Frederick II invaded the wealthy Habsburg province of Silesia within days of Charles’s death, and the resulting conflict drew in most of the major European powers plus related fighting in North America and India, ending with the 1748 Treaty of Aix-la-Chapelle, which confirmed Maria Theresa’s succession but forced her to cede Silesia to Prussia permanently. Total casualties across the war’s various fronts are estimated at over seven hundred and fifty thousand dead or wounded.
A war told across scattered archives
The war’s diplomatic and military course is documented through surviving treaty texts, official correspondence between the major courts, and campaign records held across multiple European archives, giving historians reasonably solid material for reconstructing the war’s broad political outcomes even given the usual gaps in casualty accounting typical of the period. Because the conflict effectively absorbed several regionally named wars, including a separate conflict in North America and a related war at sea, historians treat it as a connected but genuinely sprawling set of campaigns rather than a single unified theatre with one consistent documentary record.
One succession, several unrelated rivalries
Beyond the immediate succession dispute, longer-running tensions shaped the war’s scope: rivalry between France and Austria dated back generations, Britain and France were separately competing over colonial territory in North America and India, and Frederick II’s own ambitions for Prussian expansion gave him an obvious incentive to exploit Maria Theresa’s vulnerable position immediately upon her succession. Spain, for its own separate reasons connected to Italian territorial ambitions, joined the anti-Austrian coalition as well, meaning what began as a dispute over a single succession quickly broadened into a war reflecting several largely unrelated rivalries all being pursued simultaneously under the same broad conflict.
A price judged too steep by history
Historians debate whether Britain’s insistence that Austria formally cede Silesia to Prussia as part of the final peace settlement was a reasonable price for the subsidies and military support Britain had provided, or whether it represented an unnecessary sacrifice of a Habsburg ally’s core territory that did lasting damage to Britain’s alliance with Austria. Scholars also weigh how much Frederick the Great’s specific military innovations, as against simple strategic opportunism in striking early and decisively, actually explain Prussia’s ability to hold onto its Silesian conquest against a much larger opposing coalition throughout the war.
A peace that produced its own successor war
The peace settlement’s perceived unfairness to Austria, particularly the loss of wealthy Silesia to Prussia despite British support, undermined the long-standing Anglo-Austrian alliance and helped trigger a major reordering of European alliances known as the Diplomatic Revolution, in which Austria and France, traditional enemies, aligned against Prussia and Britain instead. That realignment directly set the stage for the Seven Years’ War less than a decade later, meaning the 1748 settlement functioned less as a lasting resolution than as an uneasy pause between two connected phases of the same broader European and colonial rivalry.
A pause mistaken for a resolution
The War of the Austrian Succession is worth attention chiefly as a case where a settlement widely regarded as unfair to one ally reshaped the entire European alliance system within less than a decade, turning what looked like a resolved conflict into the direct setup for an even larger war soon after. Readers interested in how peace settlements can generate the conditions for future conflict, rather than simply closing the book on the last one, will find this a genuinely instructive case. Readers wanting a settlement that cleanly resolved the underlying rivalries should expect the Diplomatic Revolution that followed within a decade to complicate that expectation considerably.