14 notable events from 1821 — wars, massacres and fires.
- Greek War of Independence
Jan 1, 1821–1829 · Türkiye · War & armed conflict
- Persecution of Muslims during the Ottoman decline
Jan 1, 1821–Jan 1, 1922 · Türkiye · Massacre
- Siege of Tripolitsa
Apr 1, 1821–Sep 23, 1821 · Greece · Massacre
- Wallachian uprising of 1821
Aug 1, 1821 · Romania · War & armed conflict
- Constantinople massacre of 1821
Apr 22, 1821–Jul 1821 · Türkiye · Massacre
- Soma Daisaku incident
May 24, 1821 · Japan · Terrorism
- Navarino massacre
Aug 19, 1821 · Greece · Massacre
- Massacre of Samothrace (1821)
Sep 1, 1821 · Greece · Massacre
- Miankale uprising (1821-1825)
Jan 1, 1821 · Uzbekistan · War & armed conflict
- Beberibe Convention
Aug 29, 1821–Oct 5, 1821 · War & armed conflict
- Saint-Barthélemy affair
1821 · Saint Barthélemy · War & armed conflict
- Central American uprising of 1821
1821 · Nicaragua · War & armed conflict
- Niš conspiracy (1821)
1821 · Scandal & controversy
- Fire of 1821 in Paramaribo
1821 · Suriname · Fire