On 13th January 1919, the Red Flag was hoisted during a naval mutiny on HMS Kilbride at Milford Haven.
Mutinies in the British Royal Navy are not well documented, but a series of them occurred in the aftermath of World War One (1914 - 1918) when agitation for trade union representation was spreading throughout the Navy. News of these mutinies was suppressed because they highlighted the poor material conditions of British sailors and also their reluctance to fight Russia after the British government had pledged to a policy of peace.

* Between 1852 and 1917 there had only been one pay increase.

* Contrary to what the people were being told, the Foreign Office and Admiralty were making arrangements to intervene in post-revolution Russia and the feeling among servicemen was that those who did not volunteer were left with no option but to mutiny.

The History of Wales