Thanks for that, looked it up and was a interesting rabbit hole: Basically, that oath was Oxford University saying "fuck you" to a request of the King (1200s England) officially after he effectively tried to order them to break their collective line and accept a rich fuck who murdered a scholar in the past. Feels kinda like a proto-union-action to me https://blogs.bodleian.ox.ac.uk/archivesandmanuscripts/2023/...