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 .

After marching Self_motion his army to the west and making a dangerous crossing Motion_directional of the frozen straits in the winter of 1657/58 , he surprised Change_sentiment the unprepared Frederick III on the Danish isles and forced him into surrender Surrendering .

During the siege , Hannibal and a large number of Carthaginian soldiers perished Death from the plague , and the survivors were in dire straits after the Greeks managed Control to cut their supply lines .

In May , Egyptian President Gamal Abdel Nasser announced Expressing_publicly that the straits would be closed to Having_or_lacking_access Israeli vessels , and he mobilized Influence Egyptian forces along its border with Israel .

Before the war Military_operation , Fort Mackinac had been an important American trading post in the straits between Lake Michigan and Lake Huron .

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