"According to a legend recorded in the Primary Chronicle for year 6472, Sviatoslav I of Kiev (circa 962–972 AD) sent a message to the Vyatich rulers, consisting of a single phrase: "I come at you!" (Old East Slavic: "Иду на вы!" Idu na vi!). The chronicler may have wished to contrast Sviatoslav's open declaration of war to stealthy tactics employed by many other early medieval conquerors. This phrase is used in modern Russian to denote an unequivocal declaration of one's intentions."
January 1, 1970
https://en.wikiquote.org/wiki/Laconic_phrases