The Anglo-Turkish War of 1807–1809, part of the Napoleonic Wars, was fought between the United Kingdom of Great Britain and Ireland and the Ottoman Empire.

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Anglo-Turkish War
Part of the Napoleonic Wars
Battle of Rosetta in Alexandria expedition of 1807
Date 1807–1809 Location Dardanelles Marmara Sea Aegean Sea Mediterranean Sea Alexandria Result Ottoman victory[1] Treaty of the Dardanelles
Belligerents
Ottoman Empire Egypt Eyalet Supported by: French Empire	United Kingdom Supported by:  Russian Empire
Commanders and leaders
Selim III Mustafa IV Mahmud II Muhammad Ali Horace Sébastiani	George III John Duckworth

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In the summer of 1806, during the War of the Third Coalition (of Great Britain, Russia, Austria, Sweden), Napoleon's ambassador General Count Sebastiani managed to convince the Porte to cancel all special privileges granted to Russia in 1805 and to open the Ottoman straits (the Dardanelles) exclusively to French warships. In return, Napoleon promised to help the Sultan suppress the rebellion in Serbia and to recover lost territories. When the Russian army marched into Moldavia and Wallachia in 1806, the Ottomans declared war on Russia.

In September 1806, the British government pressured Sultan Selim III to expel Sebastiani, declare war on France, cede the Danubian Principalities to Russia, and surrender the Ottoman fleet, together with the forts on the Dardanelles, to the Royal Navy. After Selim's rejection of the ultimatum, a British squadron under Vice Admiral John Thomas Duckworth entered the Dardanelles on 19 February 1807 and destroyed an Ottoman naval force in the Sea of Marmara, and anchored opposite Constantinople. With French assistance the Ottomans erected powerful batteries and strengthened their fortifications.^[2] The British warships were cannonaded suffering the loss of two ships. Duckworth made the decision to withdraw to the Mediterranean on 3 March 1807.

On 16 March 1807, 6,000 British troops embarked for Alexandria in Ottoman Egypt, which they captured in August. Governor Muhammad Ali mounted effective counter-attacks and a lack of supplies forced the British to withdraw. The Ottoman Empire had little military support from France due to the war with Russia; Napoleon failed to secure Russia's compliance with the armistice agreement of 1807 with Britain, which was now at war with both France and Russia.