Events in 1866

35 notable events from 1866.

• Battle of Callao
  May 2, 1866 · Peru
• Fenian raids
  Apr 1866–Oct 1871 · Canada
• Fetterman Fight
  Dec 21, 1866 · United States
• General Sherman incident
  Sep 5, 1866 · North Korea
• Memphis massacre of 1866
  May 3, 1866 · United States
• French expedition to Korea
  Oct 1866–Nov 1866 · South Korea
• Battle of Curupayty
  Sep 22, 1866 · Argentina
• New Orleans Massacre of 1866
  Jul 30, 1866 · United States
• Teradaya incident
  Mar 9, 1866 · Japan
• Cretan revolt (1866–1869)
  Aug 21, 1866–Jan 20, 1869 · Greece
• Baikal Insurrection
  Jun 1866 · Russian Federation
• Bombardment of Valparaíso
  Mar 31, 1866 · Chile
• Catholic Persecution of 1866
  1866–1871 · —
• Oaks explosion
  Dec 12, 1866 · United Kingdom
• Panic of 1866
  1866 · —
• Seven and a Half Days Revolt
  Sep 22, 1866 · Italy
• Sanjō Seisatsu Incident
  Oct 20, 1866 · Japan
• Circleville Massacre
  Apr 21, 1866 · United States
• Maungatapu murders
  Jun 12, 1866 · New Zealand
• Kurashiki Asao Disturbance
  1866 · Japan
• Teishin nijunikai-kyo ressha incident
  Oct 8, 1866 · Japan
• Welwyn Tunnel rail crash
  Jun 9, 1866 · United Kingdom
• Abkhazia uprising (1866)
  Sep 1, 1866 · Georgia
• Richard Burgess (murderer)
  Jun 13, 1866 · —
• Action of 22 August 1866
  Aug 22, 1866 · Portugal
• 1867 Macedonian rebellion
  1866–1867 · North Macedonia
• Franois rail disaster
  Dec 23, 1866 · France
• 1866 Bingöl earthquake
  May 12, 1866 · Türkiye
• Johnstown, Pennsylvania platform collapse
  Sep 14, 1866 · United States
• 1866 Gallatin County race riot
  Aug 1, 1866 · United States
• Separatist movement in Iași, April 15, 1866
  Apr 3, 1866 · Romania
• Uprising in the Kaitago-Tabasaran District (1866)
  Jul 1, 1866 · Russian Federation
• 1866 Poznań cholera epidemic
  Oct 22, 1866 · Poland
• Daimiel train collision
  Dec 9, 1866 · Spain
• 1866 Colon explosion
  Apr 3, 1866 · —