Armando Diaz was a light cruiser

Light cruiser

A light cruiser is a type of small- or medium-sized warship. The term is a shortening of the phrase "light armored cruiser", describing a small ship that carried armor in the same way as an armored cruiser: a protective belt and deck...

 of the and the sister-ship of the . She served in the Regia Marina

Regia Marina

The Regia Marina dates from the proclamation of the Kingdom of Italy in 1861 after Italian unification...

 during World War II

World War II

World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

. She was built by OTO, La Spezia, and named after Armando Diaz

Armando Diaz

Armando Diaz, 1st Duca della Vittoria was an Italian general and a Marshal of Italy.Born in Naples, Diaz began his military career as a student at the Military Academy of Turin, where he became an artillery officer. He was a colonel commanding the 93rd infantry during the Italo-Turkish War, and...

, an Italian Field Marshal of World War I

World War I

World War I , which was predominantly called the World War or the Great War from its occurrence until 1939, and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918...

.

She was launched on 29 April 1933 and served in the Mediterranean after her completion. From 1 September 1934 until February 1935 she made a cruise to Australia and New Zealand.

During the Spanish Civil War

Spanish Civil War

The Spanish Civil WarAlso known as The Crusade among Nationalists, the Fourth Carlist War among Carlists, and The Rebellion or Uprising among Republicans. was a major conflict fought in Spain from 17 July 1936 to 1 April 1939...

 she served in the western Mediterranean and was based at Palina and Melilla

Melilla

Melilla is a autonomous city of Spain and an exclave on the north coast of Morocco. Melilla, along with the Spanish exclave Ceuta, is one of the two Spanish territories located in mainland Africa...

.

In July 1940, she was present at the Battle of Calabria

Battle of Calabria

The Battle of Calabria, was a naval battle during the Battle of the Mediterranean in World War II. It was fought between the Italian Royal Navy and the British Royal Navy and the Royal Australian Navy. The battle occurred 30 miles to the east of Punta Stilo, the "toe" of Italy , on 9 July 1940...

, also called the battle of Punta Stilo. In October she took part in a mission to Albania, and in December she came under direct orders of Supermarina (Naval Headquarters) for special duties in connection with the protection of traffic to Albania

Albania

Albania , officially known as the Republic of Albania , is a country in Southeastern Europe, in the Balkans region. It is bordered by Montenegro to the northwest, Kosovo to the northeast, the Republic of Macedonia to the east and Greece to the south and southeast. It has a coast on the Adriatic Sea...

 from January 1941. However, the following month an important supply convoy to Tripoli

Tripoli

Tripoli is the capital and largest city in Libya. It is also known as Western Tripoli , to distinguish it from Tripoli, Lebanon. It is affectionately called The Mermaid of the Mediterranean , describing its turquoise waters and its whitewashed buildings. Tripoli is a Greek name that means "Three...

 required her use for cover, in company with the light cruiser and some destroyers.

In the course of this operation the ship was torpedoed and sunk by the British submarine off the island of Kerkennah in the early hours of 25 February.