Britannica Sources used in this answer

How did the diplomatic revolution change alliances before the Seven Years’ War?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

Seven Years' War: Battle of Zorndorf — Seven Years’ War Frederick II leading his Prussian troops against Russians at the Battle of Zorndorf during the Seven Years' War, August 25, 1758.

The "diplomatic revolution," or "reversal of alliances," fundamentally reshaped European power dynamics prior to the Seven Years’ War by dismantling the long-standing alignment of Great Britain with Austria and France with Prussia.1

Dissatisfied with their previous partnerships following the War of the Austrian Succession, these powers sought new arrangements. The shift was triggered by two primary agreements:1

The Convention of Westminster (1756): Fearing Austro-Russian intentions, Great Britain and Prussia signed this defensive pact to protect their respective territories and resist foreign invasions of Germany. This move alienated France, Prussia’s former ally, and caused the collapse of potential Anglo-Russian negotiations.2
The First Treaty of Versailles (1756): In response to the British-Prussian rapprochement, France and Austria—traditional rivals—formed a defensive alliance. This pact effectively isolated Prussia and drew France closer to Austria, while also facilitating a rapprochement between France and Russia.12

These treaties replaced the traditional system of alliances with a new configuration: Great Britain aligned with Prussia, while France, Austria, and Russia moved toward an anti-Prussian alignment.12