How a minor German power humiliated the Habsburgs and redrew the map of Europe
When Holy Roman Emperor Charles VI died in 1740, the young King Frederick II of Prussia saw an opening. By seizing the prosperous province of Silesia, he not only expanded his kingdom's territory and resources but also ignited a century-long rivalry that would fundamentally reshape the future of German politics.
The First Silesian War, lasting from 1740 to 1742, was driven by a complex mix of dynastic ambition and cold-blooded strategy. While Prussia cited centuries-old claims to certain Silesian duchies, the real catalyst was the death of Emperor Charles VI in October 1740. His daughter, Maria Theresa, inherited the Habsburg lands, but her succession was immediately contested. Frederick II, having inherited a well-trained army and a healthy treasury from his father, seized this moment of instability to invade Silesia, a region prized for its industrial output, mineral wealth, and strategic position along the Upper Oder.
The conflict was part of the wider War of the Austrian Succession, a chaotic struggle involving major European powers like France, Britain, and Spain. Prussia’s victory was cemented by the 1742 Treaty of Berlin, which granted it most of Silesia and the County of Glatz. This acquisition added roughly 35,000 square kilometres and a million new subjects to the Prussian state. For the Habsburgs, the loss was profound; not only did they lose their wealthiest province, but the defeat by a lesser German power significantly damaged their prestige and influence within the Holy Roman Empire.
The war’s legacy was a permanent shift in the balance of power. By twice abandoning his allies in the League of Nymphenburg to secure separate peace deals, Frederick earned a reputation for diplomatic double-dealing. More importantly, the seizure of Silesia turned Austria and Prussia into bitter, lasting enemies. This rivalry would dominate German affairs for over a hundred years, while the territorial settlement ensured that Saxony, feeling threatened by Prussia's new geostrategic reach, would remain a staunch opponent of the Hohenzollern monarchy in the subsequent Second and Third Silesian Wars.
Source: First Silesian War
