Ok so here's a little question... I have been going over my footnotes and realised that I had written "54 Anti-Tank Regiment" (War Diary) in one. But in my text I have written for instance "93rd Anti-Tank Regiment". And then there are Corps. I am not sure if it was more traditional in the past to write their number in Roman numerals - V Corps, VIII Corps, XXX Corps, etc. But sometimes I see 30 Corps. Brigade numbers don't seem to ever get written as Roman numerals, nor does 21 Army Group. On the one hand - what do you prefer? On the other - what is the most up-to-date practice?