Major Events
- Apr 29 Battle of Gate Pa (Pukehinahina): 1,700 British troops suffer their worst defeat of the New Zealand Wars at the hands of 230 entrenched Maori warriors in Tauranga
- May 20 Spotsylvania campaign in US Civil War ends after 10,920 killed or injured
- Jun 12 The Battle of Trevilian Station, the bloodiest and largest all-cavalry battle of the American Civil War in Louisa County ends with Confederate tactical victory and Union successful retreat
- Aug 5 Battle of Mobile Bay, won by the Union Army led by Rear Admiral David Farragut with the cry "Damn the torpedoes, full speed ahead!" (US Civil War)
- Aug 22 First Geneva Convention adopted in Geneva "for the Amelioration of the Condition of the Wounded in Armies in the Field" signed by 12 nations
- Sep 2 US Civil War: Union General William T. Sherman captures and occupy Atlanta, Georgia, ending the Atlanta Campaign [1]
- Oct 5 Most of Calcutta destroyed by cyclone, approx 60,000 die
- Oct 12 Brazilian troops under the command of Gen. João Propício Mena Barreto invade Uruguay in a prelude to the War of the Triple Alliance
- More 1864 Events
1864 in Sport
- Aug 2 Saratoga Racecourse, America's oldest Thoroughbred racetrack, opens its inaugural meet with four days of racing
More People Born in 1864
More 1864 Deaths
Famous Weddings in 1864
- Jan 16 White chapel murder victim and possible Jack the Ripper victim Mary Ann Nichols (18) weds printer's machinist William Nichols
- Feb 9 Brigadier General George Armstrong Custer marries Elizabeth Clift Bacon
- Sep 8 Business magnate John D. Rockefeller (25) weds abolitionist Laura Spelman (24)