Standard ancient Roman uniform consisted of a tunic, a cloak and sandal-type boots, resulting in a look like this. Now, this is all very well for Mediterranean climates but I really cannot fathom how they got along with this clothing in Northern Europe (Germania, Britannia, Northern Gaul, etc.). Was there another type of uniform more suitable to cold climates?
I know there is a theory that the temperatures were then higher than today but at least the article I've linked to talks about a difference of 1 degree Celsius - not enough to make one warm and cozy in a tunic on a cold North European winter day.
So what was the Romans' trick? Were they supermen or something?