After invading Greece and receiving the submission of other key city-states, Philip II of Macedon sent a message to Sparta: "If I win this war, you will be slaves forever." In another version, he warned: "You are advised to submit without further delay, for if I bring my army into your land, I will destroy your farms, slay your people, and raze your city." According to both accounts, the Spartan ephors replied with one word: "If".
Subsequently both Philip and Alexander avoided Sparta entirely.