| National Defence Army Corps | |
|---|---|
 Regimental war flag presentation to the Serres Division, December 1916, in the presence of the "Triumvirate" of the National Defence government (Prime Minister Eleftherios Venizelos, Lt. General Panagiotis Danglis, Admiral Pavlos Kountouriotis) | |
| Active | 1916-1920 |
| Country |  Kingdom of Greece |
| Allegiance |  Provisional Government of National Defence |
| Branch |  Hellenic Army |
| Role | Defend the territorial integrity of Greece. |
| Headquarters | Thessaloniki |
| Engagements | World War I |
The Army of National Defence (Greek: Στρατός Εθνικής Αμύνης) was the military force of the Provisional Government of National Defence, a pro-Allied government led by Eleftherios Venizelos in Thessaloniki in 1916–17, against the royal government of King Constantine I in Athens, during the so-called National Schism. By the spring of 1917, it comprised three infantry divisions that formed the National Defence Army Corps (Σώμα Στρατού Εθνικής Αμύνης) and fought in the Macedonian front. Following the ousting of King Constantine and the reunification of Greece under the leadership of Venizelos in June 1917, the Corps continued as part of the reconstituted Hellenic Army until 1920, when it became the Army of Thrace.