Which preposition to use with enslavement

of Occurrences 42%

Then with the oncoming of what we call civilization, and the growth of the sense of property, differences aroseaccumulations of wealth and power by individuals, enslavements of tribes by other tribes; and classes sprang up, and class-government, and so the material of endless suffering and oppression and hatred and warfare.

in Occurrences 2%

You could not wish to purchase freedom in India at the price of enslavement in the middle East.

Which preposition to use with  enslavement