Abstract This study examines the pivotal role of the Greek army, military diplomacy, and pedagogy in shaping Greece's sovereignty and geopolitical strategy through the lens of three key international treaties: the Montreux Convention (1936), and the Paris Peace Treaties (1947). Positioned at a critical geopolitical crossroads, Greece leveraged its military and diplomatic capabilities to navigate complex international landscapes during the interwar period, World War II, and the Cold War. The Montreux Convention redefined maritime control, with Greece asserting strategic interests in the Eastern Mediterranean. The Paris Peace Treaties solidified Greece's territorial integrity post-WWII, showcasing the Greek army’s contributions to the Allied cause. By analyzing these treaties, this paper underscores how Greece’s military engagements and diplomatic strategies informed its sovereignty and international standing. Additionally, it explores the development of military pedagogy, reflecting on how historical experiences have influenced Greek military doctrine and education. This interdisciplinary approach integrates history, international law, and military studies to offer insights into Greece’s modern geopolitical identity. Keywords: Greek Army, Military Diplomacy/ Pedagogy, Sovereignty, Geopolitical Strategy, Montreux Convention (1936), Paris Peace Treaties (1947)