Ioannis Metaxas was Prime Minister of Greece from 1936 to 1941. He is most famous for his "Okhi" statement. Faced with an ultimatum from Mussolini that Greece surrender, Metaxas' response was simply "Okhi" (Greek for "no"). Italy invaded, starting the Greco-Italian War. With numerically inferior forces, Greek General Alexander Papagos was able to repel the invaders until Italy's Axis allies joined the fray in April of 1941 in the Battle of Greece, leading to Nazi occupation of Greece.
Metaxas would die in 1941 before the end of the Greco-Italian War.