After the war, the Grand Fleet was dissolved, and "Benbow" was assigned to the 4th Squadron of the Mediterranean Fleet, where she served until March 1926. In 1919, Captain Charles Douglas Carpendale took command of the ship, a position he held until 1921. During this period, from April 1919 to June 1920, the ship took part in anti-communist operations in the Black Sea. "Benbow" and other elements of the Mediterranean Fleet supported the White Russians in the Russian Civil War. In late January 1920, "Benbow" was sent from Constantinople to Novorossiysk. There, the ship relieved "Iron Duke", and shortly thereafter rescued a group of 150 Russian soldiers and their British adviser, who had been attacked by bandits. On 1 February, Rear Admiral Michael Culme-Seymour hoisted his flag aboard "Benbow". Shortly thereafter, men from the ship were sent to inspect White positions in the Kerch Peninsula. "Benbow" was ordered to return to Constantinople in June, where the Mediterranean Fleet was concentrating to begin supporting Greek forces during the Greco-Turkish War; she arrived there on 19 June. On 5 July, "Benbow" and several other vessels left Constantinople to land a force at Gemlik to secure the harbor in order to hand it over to Greek forces that would arrive later. "Benbow"s men returned to the ship on 16 July after a Greek battalion reached the town.