On April 21, 1966, tens of thousands of Jamaicans exuberantly greeted Ethiopia's Emperor Haile Selassie I in Kingston, Jamaica. The emperor came to express gratitude for the peoples' support during the Italo-Ethiopian War and bolster the ongoing struggle for liberation in Rhodesia. This state visit repositioned Rastafari in Jamaican society and ignited widespread cultural, social, and political transformations across the Caribbean. Enter the Lion assembles a vital archive of this landmark event, gathering British colonial records, newspaper reportage from the Caribbean and Ethiopia, the official records of the Ethiopian Ministry of Information, and oral history. The authors paint an illuminating picture of the diverse political interests at play, exploring how the visit reshaped the Rastafari movement, Jamaican society, the wider Caribbean, and their Pan-African connections.