January 1, 1815
1815 treaties between the United States and Algeria
1815 eruption of Mount Tambora — catastrophic volcanic eruption in present-day Indonesia
Unification of Italy — creation of the politically and administratively integrated nation of Italy (1815–1871)
Ottoman battle in Hejaz, 19th century
Capture of HMS Cyane
Battle of the Neapolitan War
Second Serbian Uprising — 1815–1817 revolt in Serbia against the Ottoman Empire
1815 siege during the Neapolitan War
1815 conflict of the Napoleonic Wars
1815 treaty between Naples and Austria