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Songhai Empire
The Songhai Empire (aka Songhay, c. 1460 - c. 1591) covered what is today southern Mauritania and Mali. It replaced the Mali Empire (1240-1645) as the most important state in West Africa. Originating as a smaller kingdom along the eastern...

Definition
Ghana Empire
The Ghana Empire flourished in West Africa from at least the 6th to 13th century. Not connected geographically to the modern state of Ghana, the Ghana Empire was located in the western Sudan savannah region (modern southern Mauritania and...

Definition
Mongol Empire
The Mongol Empire (1206-1368) was founded by Genghis Khan (r. 1206-1227), first Great Khan or 'universal ruler' of the Mongol peoples. Genghis forged the empire by uniting nomadic tribes of the Asian steppe and creating a devastatingly effective...

Definition
Wolof Empire
The Wolof (aka Jolof or Djolof) Empire was a state on the coast of West Africa, located between the Senegal and Gambia rivers, which thrived from the mid-14th to mid-16th century CE. The empire prospered on trade thanks to the two rivers...

Definition
Ottoman Empire
The Ottoman Sultanate (1299-1922 as an empire; 1922-1924 as caliphate only), also referred to as the Ottoman Empire, written in Turkish as Osmanlı Devleti, was a Turkic imperial state that was conceived by and named after Osman (l. 1258-1326...

Definition
Holy Roman Empire
The Holy Roman Empire officially lasted from 962 to 1806. It was one of Europe’s largest medieval and early modern states, but its power base was unstable and continually shifting. The Holy Roman Empire was not a unitary state, but a confederation...

Definition
Gupta Empire
The Gupta Empire stretched across northern, central and parts of southern India between c. 320 and 550 CE. The period is noted for its achievements in the arts, architecture, sciences, religion, and philosophy. Chandragupta I (320 – 335 CE...

Definition
Khmer Empire
The Khmer empire was a powerful state in South East Asia, formed by people of the same name, lasting from 802 CE to 1431 CE. At its peak, the empire covered much of what today is Cambodia, Thailand, Laos, and southern Vietnam. By the 7th...

Definition
Portuguese Empire
The Portuguese Empire was established from the 15th century and eventually stretched from the Americas to Japan. Very often a string of coastal trading centres with defensive fortifications, there were larger territorial colonies like Brazil...

Definition
Seleucid Empire
The Seleucid Empire (312-63 BCE) was the vast political entity established by Seleucus I Nicator ("Victor" or "Unconquered", l. c. 358-281 BCE, r. 305-281 BCE), one of the generals of Alexander the Great who claimed a part of his empire after...