What was the name of the league of European nations formed by the leaders of Russia, Austria, and Prussia after the Congress of Vienna?

The name of the league formed by the leaders of Russia, Austria, and Prussia after the Congress of Vienna is the Holy Alliance. Established in 1815, the Holy Alliance aimed to promote the principles of Christianity and ensure the stability of monarchies across Europe following the upheaval of the Napoleonic Wars. It sought to foster cooperation among the monarchies to maintain peace and prevent revolutionary movements that could destabilize their rule.

The Holy Alliance was significant because it represented a commitment among the major powers to intervene in the affairs of other nations to protect established monarchies and suppress revolutionary uprisings. This alliance is often viewed as an attempt by conservative leaders to maintain the political order established at the Congress of Vienna.

Other options represent different historical alliances or organizations. For instance, the Triple Alliance refers to the military alliance formed in 1882 between Germany, Austria-Hungary, and Italy, while the League of Nations was established after World War I to promote peace. The Quadruple Alliance involved Britain, Austria, Prussia, and Russia and was formed to maintain the settlement after the Congress of Vienna but is distinct from the Holy Alliance in terms of its focus and members. The Holy Alliance is particularly associated with the conservative reaction against the tumult of