| 1st Army | |
|---|---|
| 1η Στρατιά "ΑΧΙΛΛΕΑΣ" | |
 Camp flag of the 1st Army | |
| Active | 1947 – 1948 1951 – today |
| Country |  Greece |
| Branch |  Hellenic Army |
| Type | Mechanised Infantry |
| Size | Field Army |
| Part of | Hellenic Army General Staff |
| Garrison/HQ | Larissa |
| Motto(s) | As long as [the sun] follows his course ΕΣΤ' ΑΝ ΤΗΝ ΑΥΤΗΝ ΟΔΟΝ ΙΗ Est' an tin aftin odon ii |
| Engagements | Greek Civil War |
| Commanders | |
| Notable commanders | Dimitrios Giatzis Konstantinos Ventiris Phaedon Gizikis Agamemnon Gratzios Christos Manolas Konstantinos Floros |
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.[1]
The First Army was created in March 1947, during the Greek Civil War. It controlled the II and III Corps, with Volos as its headquarters. It was abolished on 10 February 1948, and re-established in 1951 with its HQ at Larissa, where it remains to this day. Its CO is always a lieutenant general.
