By 2364, he had risen to the rank of Admiral. In that year, Mendak was among the Romulan delegates at a conference with the ambassadors and intelligence officers of the Federation, Klingon Empire, Cardassian Union, and other powers. (TOS - Vulcan's Soul novel: Exodus) Mendak fought in the Dominion War and commanded the IRW Rhliailu. He won a key victory at planet Brasîto, earning him the label "Hero of Brasîto". His ship was damaged at one point in a Dominion attack, and he had it repaired at Starbase 375. (ST novel: Articles of the Federation)