Battles on 21 August
25 battles fought (or begun) on 21 August, from 1653 to 1992, in date order. Dates are from Wikidata and are shown only for battles from 1600 onwards with a single exact date. Dates recorded in the Julian (Old Style) calendar are listed under their Julian day and marked.
Which battles happened on 21 August?
The best-known battles on this day (by number of Wikipedia language editions) are Battle of Charleroi (1914), Battle of the Tenaru (1942), Battle of the Ardennes (1914).
- Siege of Suceava (1653) 21 August 1653 – 9 October 1653Romania · Khmelnytsky Uprising
- Siege of Riga (1656) 21 August 1656 – 5 October 1656Latvia · Second Northern War
- Battle of Texel 21 August 1673At sea
- Battle of Dunkeld 21 August 1689Scotland · Jacobite risings
- Siege of Pondicherry (1778) 21 August 1778 – 19 October 1778India · Anglo-French War of 1778–1783
- Battle of Amberg 21 August 1796Germany · War of the First Coalition
- Battle of Karstula 21 August 1808Finland · Finnish War
- Battle of Vimeiro 21 August 1808Portugal · Peninsular War
- Battle of Portada de Guías 21 August 1838Peru · War of the Confederation
- Lawrence Massacre 21 August 1863United States · American Civil War
- Second Battle of Chattanooga 21 August 1863United States · American Civil War
- Skirmish near Brooklyn, Kansas 21 August 1863United States · American Civil War
- Battle of Summit Point 21 August 1864United States · American Civil War
- Second Battle of Memphis 21 August 1864United States · American Civil War
- Battle of Charleroi 21 August 1914 – 23 August 1914Belgium · Battle of the Frontiers
- Battle of Lai 21 August 1914Chad · Kamerun campaign
- Battle of the Ardennes 21 August 1914 – 23 August 1914Belgium · Battle of the Frontiers
- Battle of Hill 60 (Gallipoli) 21 August 1915 – 29 August 1915Turkey · Gallipoli Campaign
- Battle of Scimitar Hill 21 August 1915Turkey · Gallipoli Campaign
- Battle of the Tenaru 21 August 1942Solomon Islands · Guadalcanal campaign
- Battle of Marseille 21 August 1944 – 28 August 1944France · World War II
- Battle of Surkonty 21 August 1944Belarus
- Battle for Czechoslovak Radio 21 August 1968Czechia · Warsaw Pact invasion of Czechoslovakia
- Aleria standoff 21 August 1975 – 22 August 1975France
- August 1992 Şırnak Clashes 21 August 1992Turkey · Kurdish–Turkish conflict