Sultan Mahmoud II was signed a agreement with Russia in 1833, as he co-ordinated with them during the revolt of Mehmet Ali Pasha; this agreement was called Hunkar Iskelesi Agreement (The Sultan’s Stairs);

1. Both the Ottoman Empire and Russia will co-ordinate each other in case of a war.

2. In danger of a war, Russia will sent army to the Ottoman Empire.

3. If an attack occurs against Russia, the Ottoman Empire will close the Straits and hinder an attack from the Straits.

4. This agreement will be valid for eight years.