Mustafa died in 1774, at a time of unexpected success. He had seen at least the necessity of reform. Abdul Hamed I., his brother, who succeeded him, had been forty-four years a captive. He was not the prince to restore the power of his Empire: the treaty of Kutchuk-Kainardji (1774) further reduced its territory, and gave the cause for war eighty years afterwards by the clause allowing to Russia a right to represent to the Porte the grievances of the Christians in European Turkey. In 1788 the Crimea was captured by Russia; in 1789 Abdul Hamed died. His nephew Selim III. (1789-1807) had to deal with all the difficulties introduced into the East by the partition of Poland, the schemes of Napoleon, and the Mediterranean policy of Pitt. To follow these wars which resulted from the new political situation would be impossible. It need only be said that the French occupation of Egypt, and the decisive entrance of England into the Eastern question created as great a revolution in the position of Turkey as had occurred in any Monarchy of the West. The old alliance with France was broken. It became the interest of England to preserve the tottering power of Turkey as a counterpoise to Russia, and as a security for her own interests in the East.
Internally Turkey, under the energetic Selim, made a new start. A cannon foundry was begun at Galata, the Top-haneh so familiar to-day: new troops, drilled and armed after the European fashion were embodied; new taxes were levied, and a financial administration was organized which made some pretence of following Western ideas.
After what has been said so often, it may almost go without saying that there was an insurrection of the Janissaries to express the orthodox opinion of these reforms. The separation of the artillery from the Janissaries, and the creation of new regiments of infantry for Constantinople, to act as a counterpoise to the Janissaries, caused a serious revolt which was entirely successful, and the Sultan was obliged to receive the Aga as his chief minister. In the very midst of these troubles occurred the famous mission of Colonel Sébastiani, which led to the forcing of the Dardanelles by the English fleet under Admiral Duckworth. The fleet destroyed a small Turkish flotilla in the Marmora and cast anchor before the city. It was centuries since the people of Constantinople had seen a hostile fleet threatening their city. They worked night and day to repair the fortifications, to mount cannon, and to man the walls with an efficient force. In five days nine hundred cannon were placed upon the walls, and the English fleet had to retire. The Sultan was forced to declare war against Great Britain.