A battle standard bearer can join a unit of troops in the same way as any other character. If he is with a unit that is fighting in hand-to-hand combat then the unit receives an extra +1 combat bonus when working out combat results. This is in addition to the usual + 1 bonus for the unit's own standard. This is the only circumstance when an extra banner confers a further bonus. Normally troops fighting alongside their banners only receive +1 no matter how many banners are involved.