11 notable events from 1820 — scandals, wars and genocides.
- Black War
1820s–1832 · Australia · Genocide & ethnic violence
- Liberal Revolution of 1820
Aug 24, 1820 · Portugal · War & armed conflict
- Cato Street Conspiracy
Feb 22, 1820–Feb 23, 1820 · United Kingdom · Scandal & controversy
- Tongue River Massacre (1820)
1820 · Massacre
- Revolution of the Suns and Rays
Jan 1, 1820–Jan 1, 1823 · Cuba · Scandal & controversy
- Conspiracy of La Profesa
Jan 1, 1820 · Mexico · Scandal & controversy
- Callao affair
Nov 5, 1820–Nov 6, 1820 · Peru · Scandal & controversy
- Cambodian rebellion (1820)
1820 · Cambodia · War & armed conflict
- Yorkshire West Riding Revolt
1820 · Riot & unrest
- Netherlands flood of 1820
Jan 23, 1820–Jan 26, 1820 · Netherlands · Natural disaster
- Conspiracy of 1820
1820 · Paraguay · Scandal & controversy