Infantry Regiment "Soria" No. 9

Regimiento de Infantería «Soria» n.º 9
Active	1509 - current (514 years)
Country	Spain
Branch	Spanish Army
Type	Infantry
Size	one battalion
Part of	Brigada «Canarias» XVI
Garrison/HQ	Puerto del Rosario, Canary Islands
Nickname(s)	El Sangriento "The Bloody"
Patron	Our Lady of the Immaculate Conception
March	Marcha Regimiento Soria 9 Himno Regimiento Soria 9
Engagements	Battle of St. Quentin (1557) Siege of Antwerp 1576 War of the Spanish Succession 1701–1714 Siege of Gibraltar 1704 Rebellion of Túpac Amaru American Revolutionary War 1781 War of the Pyrenees 1793–1795 Battle of Vic 1810 Defence of Tortosa 1810-1811 Siege of Bilbao 1835 Siege of Morello 1838 Moroccan War 1859-1860 Battle of Trevino 1875 Spanish–American War 1898 Rif War 1920–1927 Spanish Civil War 1936–1939 Ifni War 1957–1958 War in Afghanistan
Commanders
Notable commanders	Leopoldo O'Donnell

The Infantry Regiment "Soria" No. 9 (Spanish: Regimiento de Infantería «Soria» n.º 9) is a light infantry regiment of the Spanish Army. Founded in 1509 as a tercio, it is one of the world's oldest still operational units. Today it is garrisoned on the Canary Islands and has fought in Afghanistan.

From the late 1950s to the 1990s it was part of the "Guzman el Bueno" Division, successively the 21st and then the 2nd.^[1]