The volume, a result of a collective research project, examines collaborations among interwar Balkan and East Central European feminist and women’s associations, as well as their engagement with intergovernmental alliances and diplomatic forums. It includes thematic case studies on the Little Entente of Women, the Unity of Slavic Women, the Balkan Women’s Conferences, and women’s participation in the mainstream Balkan Conferences. The book explores the relationship between feminist cooperation, national politics, and diplomacy in the region, the activities of the Little Entente of Women in promoting a shared political and feminist agenda, alongside other women’s and socialist collaborations. Additionally, it analyzes the reception and impact of these feminist actions in different national contexts and traces the activities of leading feminist figures across the region. The volume highlights the intricate interplay between nationalism, feminism, pacifism, and internationalism, covering key themes such as women’s citizenship, suffrage, labor rights, and the influence of socialism on feminist movements.