dyeing linen

[Robert Vermaat]

The "white" forces generally take the position that your tunic as a soldier can be any color you want, so long as it is white.

I say you are dreaming. You learly haven't been reading the posts in this discussion very well. I cannot see any 'white forces" in this discussion, nor continuous claims that a uniform should lways be white.
Furthermore, I doubt that you have read any of Graham Sumner's books, which is a real shame.

As to the figure with baskets & pig, no one can claim that he is a slave, or a worker, or a soldier. Mind you, I would not opt for the latter myself because he's completely unarmed, which is odd. I would not want to choose between a slave or free man, either, since we simply cannot tell without any references. Can you give us more info about that image? A date? Place?

Clavi wereused on tunics of slaves, btw - they can be seen in some of the Villa Armerina mosaics, where servants with unbelted tunics have clavi like the masters they serve.