Ottoman/Freeciv

Description
In the beginning of the 14th century Osman, a leader of a minor Turkish tribe in western Anatolia, conquered all his neighbouring tribes. A century later the Byzantine capital fell to Turkish rule which gave the Ottoman empire access to Europe. The Ottomans subsequently conquered large parts of south-eastern Europe, the Islamic Arab world as well as Egypt and much of North Africa, making it a regional superpower until its dissolution in the aftermath of World War I.