What factions are there in Water Margin? Who is the leader?

Water Margin was a classical school at first, and then it rose by Song Jiang school, with Song Jiang as its leader and Lu Junyi, Wu Yong, Li Kui jy, Dai Zhong and other confidants. There is a faction in Erlong Mountain, * * * is Lu, and there are others. Li Jun has a river system, including three brothers, Zhang Shun and others.