Battles on 21 May

13 battles fought (or begun) on 21 May, from 1643 to 2014, 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 May?

The best-known battles on this day (by number of Wikipedia language editions) are Battle of Aspern–Essling (1809), Battle of Arras (1940) (1940), Battle of Iquique (1879).

• Capture of Wakefield 21 May 1643England · First English Civil War
• Battle of Anguilla 21 May 1745Anguilla · War of the Austrian Succession
• Battle of Aspern–Essling 21 May 1809 – 22 May 1809Austria · War of the Fifth Coalition
• Siege of Jerusalem (1834) 21 May 1834 – 7 June 1834Israel · Peasants' revolt in Palestine
• Battle of Plains Store 21 May 1863United States · American Civil War
• Siege of Port Hudson 21 May 1863 – 9 July 1863United States · American Civil War
• Battle of Iquique 21 May 1879Chile · War of the Pacific
• Battle of Alexandrovsky Fort 21 May 1919Kazakhstan · Russian Civil War
• Battle of Arras (1940) 21 May 1940France · World War II
• Battle of Wakde 21 May 1944Indonesia · World War II
• Battle of San Carlos (1982) 21 May 1982 – 25 May 1982Falkland Islands · Falklands War
• Battle of Abeïbara 21 May 2008Mali
• Battle of Kidal (2014) 21 May 2014Mali · Internal conflict in Azawad