https://www.tandfonline.com/doi/full/10.1080/00665983.2021.1949148?scroll=top&needAccess=true
its very in depth but may be of interest to some here...
Cheers Dave another good one. Gildas mentions turf walls.
Intriguing, thanks. I would never have expected that we could identify the different turf-cutting techniques of individual auxiliary cohorts!