During the “high tide” of the Cultural Revolution between 1966 and 1968, almost every urban school and work unit erupted in dissension and factionalism, very often spiralling into violence. Amidst exaggerated charges, a great many basic-level leaders were toppled from below and humiliated – or worse. In every city, so-called Rebel and Conservative factions emerged from the mêlée and fought each other in the streets.