Yes, technically a BECMI module. Who doesn't mix and match?
Test of the Warlords is a campaign setting with an adventure scenario in which dominions are being set up in the land of Norwold. It is compatible with Expert or Companion D&D, or Basic Fantasy RPG and retroclone compatibles.
The fame of the player characters have earned them the right and title to run a realm of their own, under the supervision of the king of Norwold, a newly colonized region to the north of Mystara. But even from the start, with all the troubles of establishing your own pockets of civilization in as yet untamed wilderness, Norworld has become the center of attention in the struggle between two old enemies: The sorcerous empire of Alphatia and the war-mongering realm of Thyatis.