Operation Stoneage or Operation Stone Age was an Allied convoy operation to the Mediterranean island of Malta in the Second World War. To disguise the destination of the ships, some took on their cargo at Port Sudan in the Red Sea. The four ships of Convoy MW 13 sailed from Alexandria on 16 November, escorted by cruisers, destroyers and round-the-clock air cover from captured airfields in Egypt and Cyrenaica.

HMS Arethusa was the name ship of her class of light cruisers built for the Royal Navy. She was built by Chatham Dockyard, with the keel being laid down on 25 January 1933. She was launched on 6 March 1934, and commissioned 21 May 1935 by Captain Philip Vian.