Ottomans

The Ottomans were the leading faction of the Ottoman Empire.

During the later half of the 15th century, they had brokered a truce with the Ottoman Assassins, via the Assassins' leader Ishak Pasha, who was also an Ottoman Vizier.

Trivia

 * The Ottomans on the radar show up as yellow dots, while the Byzantines show as red.
 * In Assassin's Creed: Revelations Ezio can easily escape Ottoman Guards by stirring up tensions between them and Byzantine Guards, usually by luring the two factions together using a distraction like a bomb or a dead body.

Source

 * Assassin's Creed: Revelations