"During World War II when Greek dictator Ioannis Metaxas refused Axis demands for occupation of Greek territory under threat of war, he was supposed to have replied with a single word—Όχι (Ohi)—"No." The anniversary of his refusal is today celebrated as Ohi Day. Since then it has been reported that his actual response was "Alors, c'est la guerre" ("It's war then", in French)."
January 1, 1970
https://en.wikiquote.org/wiki/Laconic_phrases