August 20, 1823
1823 civil war in Costa Rica
1823 battle during the Peruvian War of Independence
1823 battle of the Peruvian War of Independence
1823 Sikh–Afghani battle
1823 battle in Costa Rica
1823 naval battle during the Brazilian War of Independence
1823 America's independence naval battle
1823 and 1847 treaties that settled boundary disputes between the Ottoman Empire and Persia
1823 war between the US and Arikara natives