So lately I have been reading about the war of the roses and have been looking up paintings of some of the battles. I started noticed that knights almost didn't wear any tabard or any other indications which side they belong to.
an example. In this painting the knights/men at arms don't wear any cloth that can indicate which side they belong to while the common foot soldiers do.
And it's the same thing in this painting
So did knights during the war of the roses wear a tabard over the armor? if not how did they distinguish friendly and enemy knights?
The first example you show is a modern painting by Graham Turner. The second is a manuscript illumination, probably painted by someone who never saw the battle depicted. So I would caution against concluding that, because of these depictions knights did not wear anything to identify thselves. I need to look up my own sources on Livery Coats before I say more.