National Sovereignty Day

National Sovereignty Day
Image of Juan Manuel de Rosas used during the 2010 celebration of the Day of National Sovereignty.
Official name	Día de la soberanía nacional
Observed by	Argentina
Significance	The day the Argentine Confederation fought against an Anglo-French navy in the Battle of Vuelta de Obligado, during the Anglo-French blockade of the Río de la Plata
Date	November 20
Frequency	annual

The National Sovereignty Day (Spanish: Día de la Soberanía Nacional) is a national public holiday of Argentina, celebrated during November 20.^[1] It commemorates the Battle of Vuelta de Obligado, which took place on 20 November 1845 during the Anglo-French blockade of the Río de la Plata. Argentine Confederation forces, led by Juan Manuel de Rosas, were attacked by a combined Anglo-French fleet. Although the attackers broke through Argentine defenses and routed Rosas' forces, the heavy losses they suffered proved that foreign ships could not safely navigate Argentina's internal waters against its government's wishes. The battle also changed political attitudes toward the Argentine Confederation among other South American nations by increasing support for Rosas and his regime. The day was enacted as a national observance in 1974, following a request from the revisionist historian José María Rosa, and promoted into a national holiday in 2010.