Which preposition to use with unification

of Occurrences 49%

Scott in Ivanhoe gives the basis upon which the unification of the languages proceeded.

by Occurrences 2%

v. and vi., on Germany, by a German professor, are interesting as giving the German view of unification by Bismarck; and chaps.

between Occurrences 1%

Must every higher means of unification between things be a literal brain-fibre, and go by that name?

in Occurrences 1%

Bismarck, by bringing about our wars of Unification in order to improve radically an untenable position and secure to our people healthy conditions of life, fulfilled the long-felt wish of the German people, and raised Germany to the undisputed rank of a first-class European Power.

into Occurrences 1%

Had it been less competitive and more cooperative and co-ordinated, western civilization might have taken another step in advance by extending cultural unification into the political arena.

with Occurrences 1%

If we are to remain in this country as a component part of the nation, I cannot fail to regard with interest any step which tends toward our unification with all the other branches of the human race in this Western Hemisphere.

Which preposition to use with  unification