At about the same time, the Smyrna Division became part of the newly formed Smyrna Army Corps under Lt. General Dimitrios Ioannou, subordinate to the Army of Asia Minor.
In 1920, the division participated in the Greek summer offensive, captured Balıkesir and took part in the advance towards Bursa.
From there the division were recalled to be used in a landing operation in support of the occupation of Eastern Thrace: the division was ferried from Asia and landed at Ereğli and Rodosto, and thence advanced north.
Returning to Asia, the Smyrna Division occupied positions around Bursa, and launched a series of raids against Turkish territory.
Following the Venizelist defeat in the November 1920 elections, the division lost its commander, Mazarakis, who resigned.