He returned to Greece in July 1919, and assumed command of the Smyrna Division in Asia Minor. In 1920 he was promoted to major general, and led his division to the capture of Balıkesir and in the advance towards Bursa during the Greek summer offensive. From there he and his division were recalled to be used in a landing operation in support of the occupation of Eastern Thrace: Mazarakis commanded the landings of troops ferried from Asia at Ereğli and Rodosto, and thence advanced north. After overcoming Turkish resistance at Lule Burgas, Babaeski and Çorlu and capturing the local Turkish commander, Cafer Tayyar, his units reached Adrianople. Returning to Asia, he led his division to new positions around Bursa, and commanded a series of raids against Turkish territory. Following the Venizelist defeat in the November 1920 elections, he resigned his commission. In 1921 he published a series of articles criticizing the new government's conduct of the war in Asia Minor, recommending the stabilization and fortification of the then-held lines instead of an advance into the interior of Turkey. Following the Greek defeat and retreat from Asia Minor in August 1922, he was appointed Greek representative at the armistice negotiations at Mudanya, but initially refused to sign the Armistice of Mudanya when it was revealed that Greece would have to evacuate Eastern Thrace. He was subsequently recalled to active service and placed as chief of staff of the Army of Evros in Western Thrace, and then participated in the Greek mission to Conference of Lausanne as a military adviser.
Senior military commands in the Interwar period
In 1924 he was promoted to lieutenant general and appointed Chief of the Hellenic Army General Staff, beginning the process for its reorganization and re-equipment following the Asia Minor Disaster. He was dismissed from his position following the coup d'état of general Theodoros Pangalos in June 1925, but was reinstated in September 1926, following the overthrow of the Pangalos dictatorship. He served as Minister for Military Affairs in the 1926–1928 Alexandros Zaimis cabinets, and in September 1928 he was elected a member of the Academy of Athens for his historical studies. He was appointed as Inspector General of Military Schools in March 1929 and soon after again as Chief of the Army General Staff, occupying the post until June 1931. In the March 1933 emergency cabinet of Lt. General Alexandros Othonaios, Mazarakis occupied the portfolio of National Education, as well as, as interim holder, of Foreign Affairs and Aviation. In 1935, following the outbreak of a pro-Venizelist coup attempt, he was suspended from active service, and finally retired in 1937 due to the age limit. In the same year, he served as president of the Academy of Athens.
Later life
Following the suicide of Prime Minister Alexandros Koryzis on 18 January 1941, amidst the German invasion of Greece, King George II of Greece gave Mazarakis the mandate to form a new government. The latter refused to formally accept before being briefed on the military situation in Epirus, and on the 20th returned the mandate to the King, both due to the rapid German advance, as well as due to his refusal to form a government with the widely loathed security minister of the Metaxas Regime, Konstantinos Maniadakis. Mazarakis died in Athens in 1943. He was married but childless.
