All-Ethiopia Socialist Movement

The All-Ethiopia Socialist Movement (Amharic: መላ ኢትዮጵያ ሶሻሊስት ንቅናቄ, romanized: Mela Ītyōṗṗyā Soshalīsit Nik’inak’ē, native acronym: MEISON, Amharic: መኢሶን) is a political party in Ethiopia. A Marxist-Leninist organization, MEISON played an active role in Ethiopian politics during the 1970s. Both it and the Ethiopian People's Revolutionary Party (EPRP) were enthusiastic supporters of the revolution that toppled Emperor Haile Selassie. However, as Mengistu Haile Mariam rose to power as leader of the ruling Derg government, conflict began to develop between the two groups. MEISON initially aligned itself with the Derg, but fell out with Mengistu as the Red Terror progressed and was repressed from mid-1977 onwards.