In the years of the Second World War, Berlin became a hub of global anti-imperial revolutionary activism. Between 1941 and 1945, scores of anti-colonial revolutionaries from North Africa, the Middle East, and Central and South Asia flocked to Germany. Driven by the contingencies of war, German officials made increasing efforts to mobilize anti-imperial movements, reaching out to the subjects of the British and French empires and the minorities of the Soviet Union. The history of Berlin’s anti-colonial nationalists sheds light on the history of anti-imperialism in the years of the global authoritarian surge of the 1930s and 1940s. In this global authoritarian moment, many anti-colonial nationalists, in search of an alternative to (Wilsonian) liberalism and socialism, turned to the rising authoritarian states, which stood for the primacy of the nation and a new world order based on the nation, not multiethnic empires. Cultivating bonds across imperial, national, and ethnic boundaries, they formed a nationalist international against empire, marked by anti-colonial militancy and reactionary cosmopolitanism.