Rimé movement
"Dorje Shugden" was a key tool in Pabongkhapa's persecution of the flourishing Rimé movement, an ecumenical movement which compiled together the teachings of the Sakya, Kagyu and Nyingma, in response to the dominance of the Gelug school. Non-Gelug, and especially Nyingma, monasteries were forced to convert to the Gelug position.