1818 in modern Argentina

Congress of Aix-la-Chapelle (1818) — Diplomatic meeting the Allied Powers after the Napoleonic Wars

Benin invasion of Akure

1818 treaties between the United States government and six Native American peoples

1818 treaties between the United States and Native Americans

1818 alliance of European nations

1818 battle fought between British East India Company (mostly Mahar soldiers) and the Peshwa faction of the Maratha Confederacy

1818 war fought between Iranians and Afghans

1818 battle between Zulu and Zwide

Battle of the Chilean War of Independence

Massacre in New South Wales, Australia