Which preposition to use with modocs

in Occurrences 2%

Hearing the firing and yells McKay left his pack animals, and under the leadership of Captain George, chief of the Wascos, attacked the Modocs in the rear.

of Occurrences 1%

It is of the Modocs of this region that Joaquin Miller wrote that "Indians have their loves, and as they have but little else, these fill up most of their lives."

Which preposition to use with  modocs