Treaty of Turkmenchay — agreement between Qajar Iran and Imperial Russia that concluded the Russo-Persian War of 1826–28

1828 military revolt in Brazil by Irish and German mercenaries

Burke and Hare murders — series of murders committed in Edinburgh, Scotland in 1828

1828 battle of the Russo-Turkish War (1828–1829)

1828 United States presidential election — 11th quadrennial U.S. presidential election

Treaty between Mexico and the United States

August 1828 treaty to recognize the independence of Uruguay

1828 Gran Columbia-Peru War naval battle