HMS Shamrock (1918)

Laid down in November 1917 by William Doxford & Sons at their dockyard in Sunderland, Shamrock was launched on 26 August the following year, shortly before the Armistice which ended the First World War. and was completed on 28 March 1919.^[6][7] The vessel was the fourth that served in the Royal Navy to bear the name.^[8] Shamrock was commissioned into the Fourth Destroyer Flotilla of the Home Fleet.^[9]

Although the war on the western front had finished, the escalating civil war in Russia continued. The United Kingdom decided to send units of the Royal Navy into the Baltic Sea to monitor the situation and to protect British interests. Soon into the campaign, it became clear that the Russians were planning to liberate the Baltic State of Latvia by integrating it into the new Soviet Union.^[10] The fleet was therefore tasked with not simply helping to help organise the evacuation of German forces from the country but also support their war of independence. This was achieved on 14 November 1919.^[11] Five days later, the destroyer arrived in Liepāja along with sister ships Serene, Sesame, Strenuous and Torbay in time to see peace restored.^[12]

On 2 May 1924, Shamrock was guard ship for the Racer while the diving support vessel recovered over 100 gold bars from the wreck of the Laurentic.^[13] The destroyer was subsequently deployed to Gibraltar. From there, the destroyer visited Seville during the declaration of the Second Spanish Republic. The crew witnessed rioting on the streets but were uninjured, returning to Gibraltar on 17 April.^[14] Between 5 and 30 April 1933, the destroyer, along with sister ship Searcher, visited Morocco and Spain, calling in at Casablanca, Cádiz, Bonanza and Tangier, as well as revisiting Seville.^[15] On 31 October, the ship escorted the first Prime Minister of Republican Spain, Niceto Alcalá-Zamora, on an official visit to the Spanish protectorate in Morocco.^[16]

On 1 February 1934, Shamrock was recommissioned and rejoined the Local Defence Flotilla at Gibraltar.^[17] The destroyer undertook another cruise between 6 and 30 April that year, visiting Huelva and Ceuta, as well as returning to Seville and Tangier.^[18] In 1936, with tensions escalating in Spain, Shamrock, was joined by five other destroyers and three cruisers, just before the start of the Spanish Civil War. The destroyer was involved in evacuating British, French and American citizens from Málaga, and then other smaller settlements.^[19][20] On 22 July, while undertaking these duties, the ship was bombed by Nationalist aircraft, but remained unharmed.^[21] Soon after, Shamrock was taken out of service. The destroyer was chosen as one of twenty-two destroyers given to Thos. W. Ward of Sheffield in exchange for the liner RMS Majestic.^[22] In consequence, on 23 November 1936, the ship was handed over to be broken up at Milford Haven.^[23]