05-07-2012, 04:43 PM
If you want some (oblique) evidence you could always quote Tacitus - Histories, II.20 has the Vitellian commander Caecina leading the Rhine legions into Italy in AD69 wearing a multicoloured 'celtic' cloak (versicolori sagulo) and trousers (bracas). If a senatorial legate was kitted out like that, his troops could easily be wearing something similar! Tacitus doesn't mention his tunic, but as others have pointed out the Gauls at this time seem to have worn long sleeves, so that isn't outside the realms of possibility either 
Nathan Ross
