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It is a little difficult for a Chinese to know that...
So...what do you mean?
Units for Mongolian civs
Units for Muslim civs
Units for Asian civs
Units for West European civs
Units for Byzantine, Moscovy.
These are for Mogolian civs (Golden Horde, Yuan) age2.
Because everything is just starting...
1300-1400, a century of the fall of Mongolian and the rise of Turkish.
Islam nations such as Timur empire and Egypt.