Isn't this the history of Islam (colonization and expansion)? Were the people in those places who got conquered not forced to comply with Islamic law?
I live in former Ottoman Empire territory where slave trade of women and young boys was rampant until the Russian Empire put an end to it.
https://upload.wikimedia.org/wikipedia/commons/thumb/0/0f/Me...
https://en.m.wikipedia.org/wiki/White_slavery#Ottoman_slave_...
