Battles on 20 January

12 battles fought (or begun) on 20 January, from 1645 to 2022, 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 20 January?

The best-known battles on this day (by number of Wikipedia language editions) are Black January (1990), Battle of Weihaiwei (1895), Battle of Imbros (1918).

• Siege of Duncannon 20 January 1645 – 18 March 1645Ireland · Irish Confederate Wars
• Battle of Millstone 20 January 1777United States · American Revolutionary War
• Battle of Rạch Gầm-Xoài Mút 20 January 1785Vietnam · Siamese-Vietnamese Wars
• Battle of Cardal 20 January 1807Uruguay · British invasions of the River Plate
• Siege of Montevideo (1823) 20 January 1823 – 8 March 1824Uruguay · Brazilian War of Independence
• Battle of Weihaiwei 20 January 1895 – 12 February 1895China · First Sino-Japanese War
• Battle of Imbros 20 January 1918Turkey · naval warfare in the Mediterranean during World War I
• First Battle of Nanawa 20 January 1933 – 26 January 1933Paraguay · Chaco War
• Action off Zuwarah 20 January 1943Libya · Battle of the Mediterranean
• Black January 20 January 1990Azerbaijan · dissolution of the Soviet Union
• Battle of In Emsal 20 January 2012Mali · Mali War
• Battle of Hasakah (2022) 20 January 2022 – 30 January 2022Syria · Syrian Civil War