What do the red shields stand for in the Battle History?
One and the same battle may be displayed with a red shield and at the same time without the red shield (just crossed swords), depending on whether I click "show my battles" or "show team battles" (although the battle in question does not involve a team member). There seems to be no connection between the red shield and the battle outcome in general (good since spoilers would be bad).
So I give up, what is the connection between a battle, the red shield and whether or not I am displaying team battles?