Which preposition to use with alani

against Occurrences 1%

When Chinsan Baian conquered the kingdom of Mangi, he sent a large body of Christian Alani against this city, which had a double inclosure of walls.

in Occurrences 1%

The Alani in some of the mountains, still hold out against the Tartars, so that two of every ten of the subjects of Sartach are obliged to guard certain passes in the mountains of Dagistan, lest the Alanians carry away the cattle in the plain.

Which preposition to use with  alani