In Greece, the Hellenic Armed Forces (HAF) are responsible for protecting Greece’s independence, sovereignty, and territorial integrity; the HAF also maintains a presence on Cyprus (the Hellenic Force in Cyprus or ELDYK) to assist and support the Cypriot National Guard; as a member of the EU, NATO, and other international organizations, the HAF participates in multinational peacekeeping and other security missions abroad, taking a particular interest in missions occurring in the near regions, such as the Balkans, the Mediterranean and Aegean seas, the Middle East, and North Africa; areas of focus for the HAF include instability in the Balkans, territorial disputes with Turkey, and support to European security through the EU and NATO

Greece’s NATO membership is a key component of its security; it became a NATO member in 1952 and occupies a strategic location in the Eastern Mediterranean on NATO’s southern flank; Greece is host to several NATO facilities, including the Deployable Corps Greece (NDC-GR) headquarters in Thessaloniki, the Combined Air Operations Center in Larissa, the Multinational Peace Support Operations Training Center in Kilkis, the Multinational Sealift Coordination Center in Athens, and the Naval Base, Maritime Interdiction Operational Training Centre, and NATO Missile Firing Installation at Souda, Crete (2025)