The Greek First Army (Greek: 1η Στρατιά, Proti Stratia), is the highest formation of the Hellenic Army and its only extant field army. Various English and German-language sources erroneously mention the existence of a First Army during the Greco-Italian War and the Battle of Greece (1940–41). The Greek Army did not employ an army-level command in this period. Leo Niehorster's website shows the higher organisation of the Greek Army on 15 August 1940, with the General Staff of the Army directly supervising five corps, three divisions, and the Thessaloniki Fortress.