Transnational solidarity excavates the forgotten histories of solidarity that were vital to radical political imaginaries during the 'long' 1960s. It decentres the conventional Western focus of this critical historical moment by foregrounding transnational solidarity with, and across, anticolonial and anti-imperialist liberation struggles. The book traces the ways in which solidarity was conceived, imagined and enacted in the border crossings -- of nation, race and class -- made by grassroots activists. This diverse collection draws links between exiled revolutionaries in Uruguay, post-colonial immigrants in Britain, and Greek communist refugees in East Germany who campaigned for their respective causes from afar while identifying and linking up with wider liberation struggles. Meanwhile, Arab immigrants in France, Pakistani volunteers and Iraqi artists found myriad ways to express solidarity with the Palestinian cause. Neglected archives also reveal Tricontinental Cuban-based genealogies of artistic militancy, as well as transnational activist networks against Portuguese colonial rule in Africa. Bringing together original research with contributions from veteran activists and artists, this interdisciplinary volume explores how transnational solidarity was expressed in and carried through the itineraries of migrants and revolutionaries, film and print cultures, art and sport, political campaigns and armed struggle. It presents a novel perspective on radical politics of the global sixties which remains crucial to understanding anti-racist solidarity today. With a foreword by Vijay Prashad.