The Hellenic Army (Greek: Ελληνικός Στρατός, Ellinikós Stratós), formed in 1828, is the land force of Greece. Along with the Hellenic Air Force (H.A.F.) and the Hellenic Navy (H.N.), it makes up the Hellenic Armed Forces. It is currently the largest branch of the three. The army is headed by the chief of the Hellenic Army General Staff (HAGS), which in turn is under the command of Hellenic National Defence General Staff (HNDGS). The motto of the Hellenic Army is Ἐλεύθερον τὸ Εὔψυχον (Eleútheron tò Eúpsychon), "Freedom Stems from Valour", from Thucydides's History of the Peloponnesian War (2.43.4). The Hellenic Army Emblem is the two-headed eagle with a Greek Cross escutcheon in the centre, representing the links between modern Greece, the Greek Orthodox Church, and the Byzantine Empire.

The Hellenic Army, apart from being the largest component participating in it, is also leading the Balkan Battle Group (otherwise known as HELBROC (an acronym for HELlas, Bulgaria, ROmania and Cyprus)), which is the largest military formation of NATO in Southeast Europe