This research report examines the seminal publication 'Letters to Uncle Sam' by Ameen Rihani's. The research tracks the political activism and literary activities of Rihani within the Arab diaspora (Mahjar) in the United States and Mexico between 1917-1919. The study works within the framework of the 'transnational activism' approach and analyzes Rihani's strategic efforts to mobilize the Mahjar in support of the Allied cause during World War I, linking their aspirations for independence from the Ottoman Empire with American economic and geopolitical interests. 'Letters to Uncle Sam' was published ...