New Redemption Grab Bag now includes an assortment of 500 cards from five (5) different expansion sets. Available at Cactus website.
“Add to battle” adds a character or enhancement to one side of a battle. If an enhancement is added to battle, it only activates if there is a character of that brigade in battle. If a character is added to battle and joins another character already in battle, that action is considered banding. If it does not join another character already in battle, the action is not considered banding.
In case you missed it, "add to battle" is banding if another EC is already in battle. Therefore, Wool Fleece prevents Unknown Nation in that scenario.