Chaos Warriors - Warband Supplement

From the introduction: The Warbands that follow the chosen sons of Chaos vary wildly. Some bands of Marauders can be as small as ten, led by a democratically assigned leader. Others number in the thousands, led by a powerful Chaos Lord who recruits through force or simply their influence. Each Warband is unique, following different Gods, philosophies, ideals (if they have any at all), or even just a vision. Some are well-established forces that have veterans who have remained for years, others are temporarily created so that smaller forces can accomplish a difficult objective. No Warband is the same as another.