The 15th Infantry Division (Greek: XV Μεραρχία Πεζικού (XV ΜΠ), romanized: XV Merarchía Pezikoú) was an infantry division of the Hellenic Army. Established for the first time briefly in 1915–1916, it was re-established in 1940, during the Greco-Italian War. The division distinguished itself in the war, where it took part in some of the most significant battles of the conflict. It was disbanded after the Battle of Greece, re-established after liberation in 1945 and subsequently fought in the Greek Civil War. It remained active in the Kastoria, Grevena and Florina areas until 1998, when it was reorganized and renamed as the 15th Infantry Brigade.