During the “long” 1960s, music played a significant but underappreciated role in promoting political radicalism and connecting far-flung social movements. This chapter examines a set of compositions and cover songs created by Latin American musicians between 1967 and 1973 in reaction to the Vietnam War. These songs belonged to a broader “playlist of protest,” a transnational repertoire of music composed during the 1960s to grow support for revolutionary politics across the Third World by fostering a shared language and sound of dissent. The project was rooted in Third-Worldism and transnational solidarity, ideas that were crucially shaped in 1967 during a protest music conference held in Cuba and attended by musicians from all six continents. This chapter shows that Third-World radicals used music during the “protest decade” to transcend geographical/cultural differences, creating a common music industry to fight against imperialist modes of cultural production.