The sweeping changes of the early 1960s gave rise to a new cycle of struggle across the North Atlantic. It was in this context that the United States escalated its involvement in Vietnam. At the forefront of the antiwar struggle were radicals who advanced a systemic critique, arguing that ending the war meant transforming the system that had created it in the first place. Believing that the system exceeded the borders of the United States, these American radicals internationalized the struggle by reaching out to antiwar activists across the globe. Radicals in Western Europe proved especially responsive to the call, with the French in particular insisting on the strategic value of internationalist coordination in the North Atlantic. French activists took a lead in not only uniting activists across borders but creating a new sense of radical internationalism centered around Vietnam. For their part, Vietnamese revolutionaries played a central role in facilitating this new internationalism. By 1967, tens of thousands of activists across North America and Western Europe had come together in a new radical international.