The Quadruple Alliance was signed in November 1815 by Russia, Britain, Austria, and Prussia, following the long series of wars that began in the aftermath of the French Revolution and concluded with the defeat of Napoleon.

When was the Quadruple Alliance finished?

That led to the Quadruple Alliance on 2 August 1718 of Britain, France, Habsburg Austria, and the Dutch Republic. The war ended with the 1720 Treaty of The Hague, which restored the position prior to 1717 but with Savoy and Austria exchanging Sardinia and Sicily.

When did the Quadruple Alliance become the Quintuple Alliance?

The Quintuple Alliance came into being at the Congress of Aix-la-Chapelle in 1818, when France joined the Quadruple Alliance created by Austria, Prussia, Russia, and Great Britain. The European peace settlement concluded at the Congress of Vienna in 1815.