The Irish 'druids' were more warlike than the British ones, as they trained specifically for war, but not near as much as the Carnutes. The Irish druids were Brehain (the preceding word of Brehon, the judges in Féineachas). I'd base the British druids upon the Ordovice legends, as the Irish druids, while related in tradition, were also related to the Carnutes, as they largely adopted their training techniques according to Irish tradition. The Irish Brehain used large two-handed swords that were the precept to the dark age Lewing Sword. When talking about British druids, we, at the time, probably would've tried to relate them to Brehain, as they were of similar origin, and served the same purpose in many ways, as religious leaders and judges, but Brehains also organized as a fighting force in the event of an invasion, and were 'officers' to the Fianna, the legendary protectors of Iron Age Gaelic Ireland.
Anyway, ranting about Irish things there, anyway, yes, the Ordovicii legends would be more accurate, I'd imagine, so giving them hammers would be more proper, as the Gaelic legends of British druids are more than likely attempts to make the British ones seem more familiar.
In the war between Mogha and Cuinn, supposedly, the reason Cuinn agreed to split the island in half with Mogha so quickly was because Mogha had one hundred Brehains present at Firbos (the field of the Firbolg, in reality probably a British tribe that was slaughtered en masse, with the remnants fleeing north to the more British related tribes, and integrating there). The presence of so many of them terrified Cuinn, and he very hastily agreed to split the island. Notable about the earliest writing about this (though happening near 450 years after the incident would've occured, but is supposed to be a very good account of the oral tradition's story), is the word 'milidh' being used to describe their status. Milidh, from the name of the supposed father of the Gaels, came to mean a champion or great warrior.
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