On October 13 Greece, Bulgaria, and Serbia replied that the offer of outside assistance and advice had come too late, and that they had decided themselves to redress the intolerable and secular wrongs of their long-suffering compatriots in Macedonia by force of arms. To their dismay a treaty of peace was signed at Lausanne about the same time between Turkey and Italy, which power, it had been hoped, would have distracted Turkey’s attention by a continuance of hostilities in northern Africa, and at any rate immobilized the Turkish fleet. Encouraged by this success Turkey boldly declared war on Bulgaria and Serbia on October 17, hoping to frighten Greece and detach it from the league; but on the 18th the Greek Government replied by declaring war on Turkey, thus completing the necessary formalities. The Turks were confident of an early and easy victory, and hoped to reach Sofia, not from Constantinople and Thrace, but pushing up north-eastwards from Macedonia. The rapid offensive of the Serbian army, however, took them by surprise, and they were completely overwhelmed at the battle of Kumanovo in northern Macedonia on October 23-4, 1912. On the 31st King Peter made his triumphal entry into Skoplje (ex-Üsküb), the ancient capital of Serbia under Tsar Stephen Dušan in the fourteenth century. From there the Serbian army pursued the Turks southward, and at the battles of Prilep (November 5) and Monastir (November 19), after encountering the most stubborn opposition, finally put an end to their resistance in this part of the theatre of war. On November 9 the Greeks entered Salonika.