Initially neutral in the Second World War, Iran was drawn into the conflict due to its strategic location and economic importance, particularly its oil resources. After the German attack on the Soviet Union, Iran’s position south of the Soviet borders became crucial for supporting the eastern front. Consequently, British, and Soviet forces occupied Iran in August 1941, transforming it into the ‘Bridge of Victory.’ This geopolitical significance post-war laid the groundwork for the Cold War. The narrative then shifts to explore Iran’s role during and after the war, focusing on the Iranian oil industry. It delves into the working and living conditions of the oil workers, the organisation of labour, the rise of political radicalism, and the involvement of political parties. A detailed analysis of the bloodiest labour conflict in 1946 highlights the long-term impact of labour radicalism on the social lives of workers and probes the persistence of these radical movements. By connecting Iran’s wartime role to post-war developments, the analysis illuminates the profound effects of global conflicts on local industries and social structures.