|Ottoman Blockade of Constantinople
Principia Moderni III
Depiction of Ottoman troops around the city.
| Roman Empire|
|Commanders and leaders|
| John VII Palaiologos ||Sultan Bayezid I Osman|
The Ottoman Blockade of Constantinople was the complete surrounding of the Roman capital of Constantinople by forces of the Ottoman Sultanate on land. The sea was kept open due to the small size of the Ottoman navy and the protection of Roman and European navies.
The origin of the blockade was the meddling of the Roman Empire in the affairs of the Ottomans. Enraged by this, Sultan Bayezid demanded that the Empire be taught a lesson, and so ordered the blockade of the city. To counter a potential siege, Emperor Manuel II left the city and traveled across Europe with his family, pleading support for what he called "the front line of Christendom," even though the Ottomans were already pressing on the borders of Hungary.
Manuel II was remarkably successful, and marshaled the support of many nations in Europe. Due to the relative safety of the waterways off of Constantinople, a large force was assembled inside the city's walls, ready should the Ottomans begin an attack. Despite the army, conflict was ultimately avoided by the Treaty of Aegina, which ended the blockade and any Roman interference in the Ottoman Sultanate.