This article investigates how, during the Spanish Civil War (1936–9), left-wing British, Dutch and German-language newspapers ‘recruited’ their readers to the cause of the Spanish Republic. Recruitment could consist of donating time, money, social and political capital, or, in extreme cases, actually joining the fighting in Spain. It employs a double comparative approach, analysing recruitment messages attuned to readers in three different national political contexts and cultures produced on behalf of socialist and communist organisations. It argues that different ‘sketches of Spain’ co-existed, aligned to different domestic political and popular cultures and through different ideological lenses. These different sketches, in turn, were vital in shaping people's expectations of the Civil War, circumscribed the scope for and content of anti-fascist transnational connections made in Spain, and helped foster new understandings of social and political circumstances at home.