Macrian appears to have been involved in building a large alliance of Alemannic tribes against Rome, which earned him the title of turbarum rex artifex ("king and crafter of unrest").
Makrian tundub olevat osalenud suure alemannide hõimuliidu loomisel Rooma vastu, mis andis talle tiitli turbarum rex artifex ("rahutuste kuningas ja meister").