With key Greek city-states in submission, Philip II turned to Sparta; he sent them a message: "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 Spartans' laconic reply was one word: "If." Philip II and Alexander both chose to leave Sparta alone. Later, Macedonian arms were carried across Epirus to the Adriatic Sea.