
The Bombardment of Almería was a naval action which took place on 31 May 1937, during the Spanish Civil War. The Kriegsmarine bombed the city of Almería in retaliation for a Republican air attack on the German cruiser Deutschland.

Baleares was a Canarias-class heavy cruiser of the Spanish Navy. The two ships of the class were built upon a British design and were a modified version of the Royal Navy′s County class. Baleares was constructed in Spain by the Vickers-Armstrongs subsidiary Sociedad Española de Construcción Naval, and saw service during the Spanish Civil War, when she was torpedoed and sunk by destroyers of the Spanish Republican Navy during the Battle of Cape Palos.

C-3 was a C-class submarine of the Spanish Republican Navy. C-3 was built by Sociedad Española de Construcción Naval (SECN) in Cartagena, Spain, launched 20 February 1929, and commissioned on 4 May 1929. She took part in the Spanish Civil War on the government side before being sunk by the German submarine U-34 on 12 December 1936.

The Battle of Cape Cherchell was a naval battle between the Nationalist heavy cruiser Baleares and the Spanish Republican Navy light cruisers Libertad and Méndez Núñez in the Spanish Civil War, several miles north of the Algerian city of Cherchell. In the early morning hours of 7 September 1937, Baleares unexpectedly met a Republican convoy consisting of two merchant ships escorted by Republican cruisers and destroyers. Baleares was beaten off and badly damaged in the engagement, but the merchantmen were lost when they tried to slip away along the Algerine shoreline.

The Battle of Cape Palos, also known as the Second Battle of Cape Palos, was the biggest naval battle of the Spanish Civil War, fought on the night of March 5–6, 1938, east of Cape Palos near Cartagena, Spain.

The Castillo de Olite was a merchant steamship, which was sunk by the coastal defense batteries of Cartagena in the last days of the Spanish Civil War, while transporting 2,112 Spanish Nationalist troops.

The Convoy de la Victoria was a Spanish naval battle on 5 August 1936 in the Strait of Gibraltar during the Spanish Civil War, between the escort of a Nationalist convoy and the Republican Navy destroyer Alcalá Galiano.

HMS Hunter was a H-class destroyer built for the Royal Navy in the mid-1930s. During the Spanish Civil War of 1936–1939 the ship enforced the arms blockade imposed on both sides by Britain and France, until she struck a mine in May 1937. She was under repair for the next year and a half, after which she rejoined the Mediterranean Fleet. During the first few months of the Second World War, Hunter searched for German commerce raiders in the Atlantic Ocean until she was transferred back to Britain in February 1940. Returning to action in the Norwegian Campaign, she was sunk by German destroyers during the First Battle of Narvik in April 1940.
The Battle of Majorca, also known as the Majorca Landings, was an amphibious landing of Republican forces early in the Spanish Civil War aimed at driving the Nationalists from Majorca and reclaiming the island for the Republic. After some initial tactical success, the expedition, commanded by Captain Alberto Bayo, ended in failure when the Nationalists counterattacked with ground troops and massively superior air power and drove the Republicans into the sea. So confident were the Republicans in their prediction of victory they optimistically called the operation "la reconquista de Mallorca" - "the reconquest of Majorca".
Mar Negro was an armed merchantman of the Nationalist Spanish Navy during the Spanish Civil War. The cargo ship was launched in 1930 along with her sister ship MV Mar Cantábrico, and after five years with the Compañía Marítima Del Nervión company, she was first requisitioned by the Spanish Republican Navy in 1936. Captured by a group of Nationalist sympathizers from her crew off Algeria in 1937, she entered in service in 1938 after being converted to an auxiliary cruiser.

The Battle of Menorca took place in Menorca between 7 and 9 February 1939 during the Spanish Civil War.