This chapter discusses the highest tide of labour mobilisation in Ethiopia to date, which occurred in close temporal proximity to the 1974 revolution and in the years that followed. The growing militancy and radicalisation of the movement is examined, against the grain of the prevailing tendency in the literature to subsume it under the historiography of the Ethiopian revolution. However, this subsumption is rejected. Instead, the wave of militancy around the years of the revolution is placed within a longer arc of internal contestation and radicalisation that originated in the 1960s. The chapter also examines the collapse of the movement against the backdrop of severe repression by the military regime, as well as the subsequent decade of yellow unionism, during which the trade unions were made formally subservient to the state.