Could these warriors be related in some way to the Sea Peoples? And if so were they to blame for the Bronze Age Collapse?

Bronze Age mercenaries emerged in Europe in the 13th century BC. These men were part of a new highly mobile warrior class, equipped with innovative weapons and armour. They came from as far afield as Scandinavia, central Europe, Italy and the Balkans and they took service across Europe but especially in Mycenaean Greece, the eastern Mediterranean and even beyond.

Their emergence heralded a new militarism in Europe which immediately preceded the devastation of the twelfth century BC