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If by aztest you are refering to the Aztec Empire, there are not any 20th century developments because it did not exist then. This empire lasted from 1428 to 1521.
By the end of the 17th century, the Russian Empire had extended eastward to the Pacific Ocean. This is quite a large expansion for an empire that had started out centered around the area of Moscow in the 19th century.
That took place in Turkey.The Armenian Genocide took place in Armenia and around Southeastern Europe killing over 60% of the Armenian population.
The Western Empire disintegrated by the end of the 4th Century, the Eastern Empire survived until the mid-15th Century.
Ottoman Empire.
A plague
A plague
The plague swept through the Roman empire. Some medical writers now think that this "plague" was smallpox.
The British Empire
christianity
6
BRITAIN had the largest global empire, both in territory and in population.
Unknown, but perhaps 20% or double the average for the Roman Empire as a whole.
The Roman empire ruled Egypt in the second century AD.The Roman empire ruled Egypt in the second century AD.The Roman empire ruled Egypt in the second century AD.The Roman empire ruled Egypt in the second century AD.The Roman empire ruled Egypt in the second century AD.The Roman empire ruled Egypt in the second century AD.The Roman empire ruled Egypt in the second century AD.The Roman empire ruled Egypt in the second century AD.The Roman empire ruled Egypt in the second century AD.
In the 13th century, the Mongol Empire was the biggest land empire.
Sikh Empire's population is 1,500,000.
Christians made up nearly one-tenth of the empire's population.