Ottoman Empire (The Purple Mantle)

The Ottoman Empire posed a great threat to the Asian and Europeans kingdoms during several centuries, however they were detained in the XV Century.

History
XI Century: The Crescent Arabic presence and the divisions weakened the Empire. The crusades continue this process.

XIV Century: The arrival of the Seljuk Turks led to the rise of the Ottoman Empire and important advances over the declining Empire.

XV Century:

1448: The sudden assassination of Murad II and his son Mehmet II (by rival factions on the Turkish tribes) prior to the Second Battle of Kosovo, causes a great defeat the the Ottoman State.

1453: The Ottoman Advance finished the Eastern Roman Empire, but the city remains undefiled and so does the Ancient Tradition in it ...
 * European-Asian Trading Continues.

1470: The Ottoman State launches another attack on the City of Constantinople, however the siege is curtailed by the joint forces of the Byzantine army/navy, the Wallachian forces and the Italian fleet (fighting more to protect the trading pass than the Byzantines themselves).
 * Internal crisis rises in the Ottoman State, situation exploited by the Byzantines, who re-inforce their defenses and expand their territories.

XVI Century:

1515: The Byzantines Capture The City of Suez from the Ottoman Empire.

1914: First World War:
 * The Byzantine Kingdom Enters the WWI allied to the "Entente".
 * The Russian Empire Enters the WWI allied to the "Entente", but avoid major involvement, reducing costs. While selling equipment and sending Units along the Byzantine Front.

1918:
 * The Aztec Empire Enters the WWI after remaining neutral the first years, allies itself to the "Entente".