By 18 July 1919, "Ajax" was assigned to the 4th Battle Squadron of the Mediterranean Fleet and was refitting in Malta. In February 1920, she assisted in the Evacuation of Odessa, Russia, and returned to Constantinople, Turkey, on 12 February. Vice-Admiral Sir John de Robeck, Commander-in-chief of the Mediterranean Fleet, hoisted his flag in "Ajax" on 18 April and the ship sailed to the Caucasus to allow him to investigate the situation there as the Bolsheviks advanced. After his arrival two days later, the ship briefly bombarded Bolshevik positions near Sochi before arriving back at Constantinople on 25 April. At the beginning of June, "Ajax" was in Sevastopol, although she was in Batumi, Georgia, by 22 June, where she remained until 9 July to cover the evacuation of the city by White forces.