International relations (1814–1919)
This article covers worldwide diplomacy and, more generally, the international relations of the great powers from 1814 to 1919. This era covers the period from the end of the Napoleonic Wars and the Congress of Vienna (1814–1815), to the end of the First World War and the Paris Peace Conference (1919–1920).
Source: Wikipedia — International relations (1814–1919) (CC BY-SA 4.0)