and when the occupying forces from the republic finally arrived at the plains via l'oiseau mecanique , the troops found no adversaries , but various tribes , all of whom had the amalgamated appearance of being indigenous to the area , though this simply could not have been the case : tribes of young socialites , tribes of their elders , tribes of migrant laborers , tribes of auto mechanics , tribes of general infantry from the morellan resistance , tribes of their officers , even a tribe consisting of the horn section of scabby mcgraw and the magna-poops .