In the summer of 1806 , during the War Hostile_encounter of the Third Coalition ( of Britain , Russia , Prussia , Sweden ) , Napoleon 's ambassador General Count Sebastiani managed to convince Convincing the Porte to cancel Change_event_time all special privileges granted Preventing_or_letting to Russia in 1805 and to open Process_start the Ottoman straits ( Dardanelles ) exclusively to French warships .

During the Dardanelles Operation Military_operation in September 1806 , Britain pressured Convincing Sultan Selim III to expel Extradition Sebastiani , declare Expressing_publicly war Hostile_encounter on France , cede the Danubian Principalities to Russia , and surrender Surrendering the Ottoman fleet , together with the forts on the Dardanelles , to the Royal Navy .

During the Dardanelles Operation Military_operation in September 1806 , Britain pressured Convincing Sultan Selim III to expel Extradition Sebastiani , declare Expressing_publicly war Hostile_encounter on France , cede the Danubian Principalities to Russia , and surrender Surrendering the Ottoman fleet , together with the forts on the Dardanelles , to the Royal Navy .

After Selim 's rejection Agree_or_refuse_to_act of the ultimatum , a British squadron , commanded Control by Vice-admiral Sir John Thomas Duckworth , entered Arriving the Dardanelles on 19 February 1807 and the British destroyed Destroying the Ottoman naval force in the Sea of Marmara , and anchored Connect opposite Constantinople .

The treaty granted the Allies the right to occupy Control forts controlling Control the Straits of the Dardanelles and the Bosporus ; and the right to occupy Control `` in case of disorder '' any territory in case of a threat to security .

The German ships evaded Escaping the British fleet and passed Motion_directional through the Dardanelles to reach Arriving Constantinople , where they were eventually handed over Giving to the Ottoman Empire .

The Dardanelles Operation Military_operation was the Royal Navy 's unsuccessful attempt to impose Action British demands Request on the Ottoman Empire as part of the Anglo-Turkish War Hostile_encounter ( 1807-1809 ) .

The ships immediately available for the task were HMS `` Canopus '' , HMS `` Standard '' , HMS `` Thunderer '' , HMS `` Glatton '' , and the two bomb ships HMS `` Lucifer '' and HMS `` Meteor '' , under the command Control of Vice-Admiral Cuthbert Collingwood , commander-in-chief of the British Mediterranean Fleet , sailed Self_motion for the Dardanelles and made preparations for the upcoming assault Attack .

In addition , four Russian ships-of-the-line under Admiral Dmitry Senyavin were sent Sending to support Supporting the British , but did not join Becoming_a_member Duckworth until after the exit Departing from Dardanelles was made Manufacturing .

The British were then to go on to capture Conquering the forts that guarded Defending the straits of the Dardanelles .