Two years after the Treaty of Belgrade war broke out with Persia because of Nadir Kuli Khan's attempt on Mesopotamia, and it continued from 1743 to 1746 with varying fortunes. When peace was signed Turkey retained the frontier fixed at the time of Murad IV. and Persia procured a few privileges for her pilgrims to the holy places. Turkey refrained from taking part in the War of Austrian Succession in spite of the efforts of France, and she maintained a peaceful attitude during the disorders which followed the death of Nadir Kuli Khan in Persia. The sultan died in 1754 and was succeeded by his brother Osman III. The only noteworthy events of the latter's reign were the first Wahhabi rising and the issuing of the first order for veiling women's faces.
Mustafa III. (1757-1773).—Koja Raghib Pasha, the grand vizier at the accession of Mustafa III., sent an envoy to Berlin, and a treaty of friendship and commerce was signed on March 12, 1761. While he was alive Koja Raghib Pasha kept the sultan out of war. He controlled Turkey's foreign affairs while the sul tan, who was of a fanatical disposition, concerned himself with the dresses and the veils of women. He projected an alliance between Turkey and France, but France and England having differences over the Indian possessions, such a treaty might have affected the English interests among the Muslims and in consequence Porter, the British ambassador in Istamboul, used his influence against it.
Before long events in Poland drew Turkey into the general war. Catherine II. of Russia tried to put her favourite, Stanislas Poniatowski, on the Polish throne on the death of Augustus III. The Poles complained to the Porte and urged Turkey to fight Russia. The sultan at first contented himself with protests, but Russia had violated the neutrality of the Kabardia, while in Serbia, Moldavia and Montenegro the Russian monks carried on seditious propaganda against Turkey. Turkey issued an ultimatum to Rus sia demanding that she withdraw her army from Poland. On her refusal war was declared. Turkey procured the neutrality of Eng land, Holland and Sweden in this war, and Austria undertook to remain neutral in return for certain privileges. Nevertheless Tur key had entered the war without preparations. The Turks were first defeated by the Russian forces in Georgia, Crimea and Kabardia, and on the Dniester; the Russian Baltic fleet under Alexei Orloff reached Morea, and incited the inhabitants to revolt. The Turkish fleet was burnt near Cheshme by the Russian fleet under the command of a Scottish admiral. The Turks were de feated in Kartal by Russia, who invaded the principalities, and reduced the fortresses on the delta of the Danube and on the Dniester. In 1771 the Crimea was conquered by the Russians.
Although the Austrians had undertaken to mediate and to assist the Turks, they preferred to take a share in the partition of Poland. After a fruitless conference at Focshani, the Russian rep resentative at the Conference of Bucharest (1773) issued an ultimatum demanding the free navigation of the Black sea and the Aegean sea for Russian trading vessels and warships, the cession of Kilburun, and the right to protect the Orthodox subjects of the Sultan. Turkey refused these terms, and the war continued, the Turks fighting hard in Silistria and Varna. Mustafa died in 1773.