'The Vengeance of Arn, Fragments' by Dionnet and Gal
from the April 1985 issue of Heavy MetalAfter appearing regularly in the late 70s in Metal Hurlant / Heavy Metal , Jean Pierre Dionnet and Jean Claude Gal discontinued their strip 'Conquering Armies' and focused on a quasi-spinoff, titled 'Arn', throughout the 80s.
By and large HM didn't present many installments of Arn, but here's a brief tale from April, 1985.