That is a Jihad, it is kind of the Muslim version of a crusade. It can only be used to retake land once held by that faction. While that is somewhat limited in scope the offset is they are rather cheap to build and you can have many at one time.Theres some guy with a big cresent moon,
"i cant build him only seen enemy's send him to get my land i had taken from them so i dunno what its called"
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