This article explores the phenomenon of high levels of public trust in the military across the Global South. We extend arguments from the US civil-military relations literature to a broader context and generate testable hypotheses to explain trust in the armed forces driven by the military’s performance and professionalism, and the public’s patriotism and partisanship. Using public opinion survey data from 73 countries between 1995 and 2017, we find broad but nuanced support for the hypotheses. Many determinants of public trust in the military, theorized in the US context, generalize globally: battlefield performance, resources, national pride, and right-wing partisanship all increase trust in the military, while coups and civil wars decrease it. By contrast, the effect of conscription is opposite to that in the United States, with national service providing a trust boost. The study highlights the implications of public trust for civil-military relations, political stability, and governance.