Troy
Before the fall of Troy, during the dawn of the War, King Priam sought to create an alliance with the strong Kingdom of Sparta in Northern Greece, to defend Troy when the war had begun. King Aeneas, or Helikaon as he was said to be known, King of Dardanos, was a good friend of Hektor and King Priam, and sided with the Trojans in the war. Unfortunately, on the journey back, after Hektor and Paris had forged an alliance in Sparta,  Paris took the wife of the King of Sparta, Princess Helen, without his consent, as they had fallen in love.  This ended the alliance,and Sparta eventually joined the fighting cause of King Agammenon.